Malicious PDF — malware analysis report

Static analysis result for SHA-256 69da89e4af46c31c…

MALICIOUS

PDF

68.7 KB Created: 2021-02-17 10:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cde996f9705bd590c4c801f996b30352 SHA-1: d9411c0905b08ba8ee287f01d3cecd6dd260a79d SHA-256: 69da89e4af46c31c75a5aba027ddfe66e8a263f7514c1d79e27527191d0cb017
134 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting and contains external URIs. The presence of a 'download button' heuristic further suggests a lure to download content. Although no scripts were explicitly extracted, the PDF structure and embedded links point towards a phishing or malware distribution attempt, likely involving a download of a secondary payload.

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
  • 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 https://baarspo.ru/wix?keyword=pip+camera+apk+mobile9 PDF link annotation
    • http://kofoxulemaxabur.22web.org/younow_free_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376354/normal_60063de820b2d.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/hfihic7/stickers_for_iphone_text_messages.pdfIn PDF document text
    • https://cdn.sqhk.co/kanedufopuma/icacPNz/disney_byju_s_learning_app_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/gbZQ7hj/ludo_battle_kingdom_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493891/normal_602cb0a26fb6d.pdfIn PDF document text
    • https://cdn.sqhk.co/zezovajav/r7Agjt3/sad_okay_meme_gif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482023/normal_602aa657c8f6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepesori.rf.gd/95542099884.pdfIn PDF document text
    • http://dujazenemelix.epizy.com/76995124699.pdfIn PDF document text
    • http://rujemivegelap.epizy.com/parafadanugizubolijalavoz.pdfIn PDF document text
    • http://luvoxijamubisur.rf.gd/kakoxaj.pdfIn PDF document text
    • http://xorabaza.rf.gd/houston_texas_police_department_accident_report.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/gunimubirasakubapite.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/risk_analysis_template_business_plan.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD81 5260 bytes
SHA-256: fe0eeafe633d5489e380c74f77fcd01dfd96243f8ca445ac881e1e81b013d4f7
font_01_sfnt_off0000df4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4D 11900 bytes
SHA-256: 645e32dcb675d4b9680ac0711f511bddde8b08e4934b65b0856b7a0518cb3a27

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