PDF malware analysis — malicious · c64707f00c296c95

MALICIOUS

PDF

81.4 KB Created: 2021-09-12 02:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: ff46ea3909ac50f29d5193bdbc66514c SHA-1: 20a6c6fab4d7cfd2b9c6fc1f9e2e78d5f1fb3068 SHA-256: c64707f00c296c9572b88e2b5d2a63b964658de4d34c74e4e256f4c3b508f296

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution document. The embedded JavaScript likely facilitates the redirection to malicious sites, as evidenced by the numerous external URLs found.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
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://synerhu.ru/uplcv?utm_term=free+bypass+google+account PDF link annotation
- http://hebammenglueck.de/ckfinder/userfiles/files/79234373545.pdfIn PDF document text
- http://tianlanip.com/filespath/files/20210904133802.pdfIn PDF document text
- https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/tirigimun.pdfIn PDF document text
- http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebd4c67918---22190146848.pdfIn PDF document text
- https://creativitagh.com/pevron/www/img/file/muwewavadivajekepukire.pdfIn PDF document text
- http://www.horakgolf.cz/ckfinder/userfiles/files/93385913931.pdfIn PDF document text
- http://jjc-dev.com/userfiles/file/6269257146.pdfIn PDF document text
- http://propertiesforrent.com/userfiles/file///22221104350.pdfIn PDF document text
- https://lienlacanien.com/img_pages/file/25358236225.pdfIn PDF document text
- http://xn--vb0b83rba554gca.kr/page_data/file/20210902080348.pdfIn PDF document text
- https://radmangroup-ye.com/rgfiles/file/39621975053.pdfIn PDF document text
- https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/75922601956.pdfIn PDF document text
- http://thumpamonpally.com/userfiles/file/88331658687.pdfIn PDF document text
- http://ultrabeauty-ff.ru/userfiles/file/1147358251.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/pnkrlbggg7fhne10puu5nq77t2/23287257177.pdfIn PDF document text
- https://dsverano.com/UserFiles/File/defuj.pdfIn PDF document text
- http://kiko168.com/UploadFile/file/20210903222741748.pdfIn PDF document text
- https://asesoriagade.com/app/webroot/files/files/wagezuta.pdfIn PDF document text
- http://rpsbchamber.org/editorData/file/12722747945.pdfIn PDF document text
- https://citytrafik.nu/images/file/19676544315.pdfIn PDF document text
- http://przedszkolenisko.pl/userfiles/file/1302663098.pdfIn PDF document text
- http://hourinkan.net/js/upload/files/budegulel.pdfIn PDF document text
- https://www.meditech.cz/ckfinder/userfiles/files/69301697374.pdfIn PDF document text
- 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000da9e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA9E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f2b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2B0	17248 bytes
SHA-256: `154c646b172b4bae65909c0e49c71dc905b305ecfbc5b090e70f60f721a8632b`
`font_02_sfnt_off00011f27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F27	10788 bytes
SHA-256: `b6fc662a0926570a94ea4bd43fc78456f9722c0ba4084ded86dbc13db6dbe19e`

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