PDF malware analysis — malicious · 8c0803696d0836c1

MALICIOUS

PDF

88.4 KB Created: 2021-09-07 23:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: c796854f713adf1fa6fffdc7ef081be4 SHA-1: 82eff0b64c1a0d2fe2fb507b2c5117693aa3b8eb SHA-256: 8c0803696d0836c143a241115b4f8019b2106ac0ff05feed6b4651172489d067

212 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It employs social engineering tactics, specifically an urgency lure and a browser extension/update installation lure, to trick the user into downloading further malicious content. The embedded JavaScript stream, though not fully analyzed due to its nature, likely facilitates the execution of malicious actions or the download of additional payloads from the numerous external URLs present.

Machine Learning

Nyx PDF Classifier malicious score 0.9746

Heuristics 9

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/effbfbb29c23f8a981d57857ab246a3f/21758103195.pdf In PDF document text
- http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df440d8367b---zofoso.pdfIn PDF document text
- http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160a50a860d1d4---73720199962.pdfIn PDF document text
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b8045eea02e---35474536330.pdfIn PDF document text
- http://kleinschaden.expert/userfiles/file/48250025275.pdfIn PDF document text
- http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c5a9e94d2---tisasafalewepilekixorofek.pdfIn PDF document text
- https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16136de4340ab9---4946031896.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb6ffb23d55---37987281664.pdfIn PDF document text
- http://clinicaveterinariagoitese.it/userfiles/files/88938904316.pdfIn PDF document text
- http://www.deopendeur.org/imgUser/file/zarubi.pdfIn PDF document text
- http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16079a539e16e6---mexizejuwunowiridu.pdfIn PDF document text
- http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094db0c3f8bd---gajeruforabaxalipexok.pdfIn PDF document text
- https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/2gra88thad8i9m3nomt6oie6os/pamonezuzukuketititevud.pdfIn PDF document text
- https://schmitz.cz/res/file/daxefibikuferile.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161058306223b1---koxodatovowo.pdfIn PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/9a6f6c28fa7580b4fae8f55541c6783f/20846067800.pdfIn PDF document text
- https://tedvandergulik.nl/userimages/file/39596208709.pdfIn PDF document text
- https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824c9a20a27---34486460297.pdfIn PDF document text
- http://laulumaja.fi/ckfinder/userfiles/files/61550301306.pdfIn PDF document text
- https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/912iuhhh0nrcus9k7nb8562097/juwanesitebifanasiwogaz.pdfIn PDF document text
- http://danfilenemd.com/clients/67744/File/kilelinulisabanazaso.pdfIn PDF document text
- http://garage-fuji.jp/js/upload/files/ruxore.pdfIn PDF document text
- http://coatsofarms.com.au/ckfinder/userfiles/files/kipozazejas.pdfIn PDF document text
- http://studiostocchi.eu/userfiles/files/wirusodewujabeze.pdfIn PDF document text
- http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/sanuzilo.pdfIn PDF document text
- http://neurooperations.com/ckfinder/userfiles/files/kazejutezefejon.pdfIn PDF document text
- https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/7cb3b95b3708e08acf28d5069089fa1b/92263626073.pdfIn PDF document text
- http://humanitool.ru/userfiles/file/44704212349.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=oecd+guidelines+425+pdfPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off0000db33.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xDB33	18080 bytes
SHA-256: `6338032098d265fb2b7686d9189678f61c342d4aaf368448b66023aa23ebc0be`
`font_01_sfnt_off0000f765.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF765	16652 bytes
SHA-256: `5f40b54402c2e32c9f9ddf3ba13f07144908e8e21b38c492330305b75e22a1f9`
`font_02_sfnt_off00012296.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12296	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00013aad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13AAD	10772 bytes
SHA-256: `816a075e9865faf61f5e0e4383c44ab5232eb6ad79fff6bf17deb9ece6443918`

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