Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf149e2c015ac348…

MALICIOUS

PDF

68.2 KB Created: 2021-02-28 20:20:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6e0b78ed02fc7e88e9759b3836e4c201 SHA-1: 9f4588f020fb596bf8ef21f9e4435cd9f0f05dda SHA-256: cf149e2c015ac3483c197a258edb44b6a97708230e92ffc16447de112979777d
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-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.
  • 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://leonvi.ru/strik?utm_term=troy+bilt+mustang+42+replacement+blades PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4503617/normal_6033c04c93e2f.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/Diaghjx/rise_of_kingdoms_best_commanders_to_level_up.pdfIn PDF document text
    • http://jirafka.space/new_york_guide_book_2019nclbr.pdfIn PDF document text
    • http://shoop-fk.ru/what_does_ni_hao_ma_mean_in_chinesed2y8z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502246/normal_5fcc14549d0c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368497/normal_5febc01d69477.pdfIn PDF document text
    • http://cucoupon.info/tamewavafuzamambtm5w.pdfIn PDF document text
    • http://cleaner360.shop/business_information_technology_salary_in_kenyasziyk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_601e586b84848.pdfIn PDF document text
    • http://relax35.ru/tifijagewoxeva8dsk.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/gWhfjgi/25115730261.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/jiiihjf/unicorn_photo_booth.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/oRhgSjj/45403264194.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/ib8H352/ludo_king_online_play_plonga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444095/normal_5ff54269bc1c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jutefuzu.rf.gd/18618233419.pdfIn PDF document text
    • http://wuxipuretox.rf.gd/21153314.pdfIn PDF document text
    • http://virixavop.epizy.com/16308946784.pdfIn PDF document text
    • http://losapudobo.epizy.com/72372964456.pdfIn PDF document text
    • http://daguwirebumovo.epizy.com/81855893908.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_off0000cb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB68 5804 bytes
SHA-256: 65dbf6979b2cb77909c605a84ef4b8926d91b4c58f1fe892d480e56ae8ae294e
font_01_sfnt_off0000df20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF20 10064 bytes
SHA-256: f84b59cf982092d482c910bdda2c16875bceed88654778da57910ac570b44e59