Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc1d7c980cbc3c6…

MALICIOUS

PDF

73.5 KB Created: 2021-02-26 14:37:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f3d2899bc86179b9fd6ed0def3dcc010 SHA-1: 3881e4cc63177619d5691e8b74ce7bbabaec93af SHA-256: 2fc1d7c980cbc3c6dfa724103790ca58d5c806ddefcbae426c40d71400527a10
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://fokemale.ru/wix?keyword=2004+nissan+350z+parts+manual PDF link annotation
    • https://cdn.sqhk.co/bikegola/dlGgjgj/65420466809.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/Ljdhbjd/table_tennis_champion_mod_apk_unlimited_money.pdfIn PDF document text
    • https://kefubawivamati.weebly.com/uploads/1/3/5/3/135304753/f06be.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/tekovot.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/ritetemp_thermostat_screen_not_working.pdfIn PDF document text
    • https://kigilejujagenit.weebly.com/uploads/1/3/1/4/131438309/925522.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://karatufi.epizy.com/61067231867.pdfIn PDF document text
    • http://bazusokilole.rf.gd/best_dryer_sheets_for_static_cling.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/how_to_build_your_own_vocabulary.pdfIn PDF document text
    • http://fesemuk.rf.gd/tijasobubepamazupolaz.pdfIn PDF document text
    • http://nununad.myartsonline.com/36347856363.pdfIn PDF document text
    • http://dazoxamawix.rf.gd/paxinotenoran.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/how_to_solve_replace_toner_error_in_brother_printer.pdfIn PDF document text
    • http://tanozetodane.rf.gd/dividing_fractions_grade_8_worksheets.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_off0000e2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D7 5568 bytes
SHA-256: ae177a278a75bb33c363aa33c318f59392276dd84df8a2b30b12739a072d8834
font_01_sfnt_off0000f5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BA 10224 bytes
SHA-256: 803e69ac9492481eb0a9f0a88959a7b1f2b6307066ed5b75853afeca8e07fd50

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