PDF malware analysis — malicious · 7ac3aa0020c7ffd3

MALICIOUS

PDF

90.8 KB Created: 2021-06-27 04:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 9c7a04e65e13be13a6d391544576da08 SHA-1: 1c353a69aca2836ac5816b3976186717ed440ef9 SHA-256: 7ac3aa0020c7ffd3d5ec0c939afb753a804a22878b26e69a009e6f0491268191

204 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download' button lure further supports this, aiming to trick users into downloading a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 8

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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 http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/binaf.pdf In PDF document text
- http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/88kjgcae4im1rkeq8evr6dd213/xebutuketanewilavemoxufu.pdfIn PDF document text
- http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607e385c71658---89244285293.pdfIn PDF document text
- https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/trnqn5oj6b7v0kb8rmtokjpoqp/lidafufijifunije.pdfIn PDF document text
- http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bd2c6ef47---58876787422.pdfIn PDF document text
- https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bcd3a3c76---53949519826.pdfIn PDF document text
- https://acgroupenterprise.com/userfiles/file/29710034660.pdfIn PDF document text
- https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/68a5cb561ec99a0cd40ef220897d6acd/8061210937.pdfIn PDF document text
- http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3082ef1509---duboxosokunerumisete.pdfIn PDF document text
- http://status-go.net/gfx/userfiles/files/sijixozegu.pdfIn PDF document text
- https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/fcc16a2d3cdc84a914e184218588b00b/jomon.pdfIn PDF document text
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/1ogrgh2mtk61lg923dckbnd4e2/mebobuvowamakegid.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160700a910f2e4---rimude.pdfIn PDF document text
- http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/kdeeku29kmv0eg60pqld76ion1/bojenamo.pdfIn PDF document text
- http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160907c6e23901---kebenowove.pdfIn PDF document text
- https://xo-sound.ru/userfiles/file/dufot.pdfIn PDF document text
- http://galluccifaibano.it/userfiles/file/zeximiwesezexosasusu.pdfIn PDF document text
- http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b461b9172---76210889847.pdfIn PDF document text
- https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a486669db16---suxiwunutadorozelon.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d88c40b707---vubawojuka.pdfIn PDF document text
- https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/cml9rvg2u40taqmr1budl8531k/68967542600.pdfIn PDF document text
- http://ladyvenus.it/userfiles/files/dedesiwukafed.pdfIn PDF document text
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091da61ba364---42868122296.pdfIn PDF document text
- https://micast.de/wp-content/plugins/super-forms/uploads/php/files/vls0q18tqp4s9hogftni76sn1m/mexikezepuzibenumufarojof.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=identifying+minerals+worksheet+answersPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fe7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE7D	17476 bytes
SHA-256: `359dc49b97701c2709a0e97b519d55a92ed364c6fd750f0a5cf701d941b09388`
`font_01_sfnt_off00012c66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C66	11044 bytes
SHA-256: `009cb8702f69a7fcd22ac4d6fec7f0cdc731467cca3277b42a0d5ad088bd32d4`
`font_02_sfnt_off000145c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x145C5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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