Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da97169fbe905a2…

MALICIOUS

PDF

66.8 KB Created: 2021-06-20 04:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6f9ddb39dec1b265e4d3ba462daf312b SHA-1: cd5053dd63983573ce19057112f6d00884f2c676 SHA-256: 8da97169fbe905a2be302f3b5a2db9effdaec362e10380e749e8b3f87f8a86f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded links, many pointing to compromised WordPress sites and disposable hosting, designed to redirect users to malicious content. The document body text, though partially obfuscated, mentions "Russian squat program", suggesting a lure for potentially harmful software or services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://pixomot.ru/uplcv?utm_term=russian+squat+program PDF link annotation
    • http://mmckno2010.zkosuchdol.info/files/91904741666.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/lokepivelexuv.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/bbd345ba4b341395be72c1f1aae86aac/29303253721.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/7g6hbf4itrhkrhblam1256c5jq/turabufitujabunotek.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/u9mo16ts9r8akt1anjfmtjv8jt/25148067736.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/18e1ae9f2dfb1e6b3a06619d7ec404aa/foxakamize.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/utlovibd5vdeleigsf8m8n2up9/90949706839.pdfIn PDF document text
    • http://soles2walk.cz/data/file/jisakarajizufowep.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/6689649bdb7f49d961a45ff841fa6936/52575939600.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/5d9c1a21497d2d2986dbb52c1a830bae/sapiwejawagemonib.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/3fb05aea96b8479069a5da372985d597/81204563392.pdfIn PDF document text
    • http://thietbixanh.net/uploads/files/padoleloduvepipesasar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC581 5240 bytes
SHA-256: 02e173312852227da1915c8a730dad09da8ba945408a0dc0f2179fc4215a3f3b
font_01_sfnt_off0000d746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD746 11628 bytes
SHA-256: 7a51ee0f9432590f628270315ca4d1613ca8686519017dde3776472a24aac4cb

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