Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e4194ff21a21bce…

MALICIOUS

PDF

69.5 KB Created: 2021-03-10 16:13:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8b1a2e7c870404a90dba77b8fa1be737 SHA-1: c2da1dda93ac28a5fdc375f77db46c11664db28f SHA-256: 5e4194ff21a21bce7bdfa33b6e744b26f861340358bd78172e6629b819d269e1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

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 0.9662

Heuristics 4

  • 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
  • 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://jumiwimov.ru/award?keyword=april+2020+calendar+pdf+wincalendar PDF link annotation
    • http://gratoramaa.website/niwepupou95g3.pdfIn PDF document text
    • http://lestyprin.online/30319893174lrz7r.pdfIn PDF document text
    • https://cdn.sqhk.co/dadakafopina/fhfjegd/takokigetagovuru.pdfIn PDF document text
    • http://larizoseviditib.iblogger.org/bujewin.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/aicgiib/bewawafulaximumoworewen.pdfIn PDF document text
    • http://4escam-bot.online/3616806497tzky3.pdfIn PDF document text
    • https://cdn.sqhk.co/jimatoju/hctvdWB/54985499831.pdfIn PDF document text
    • https://cdn.sqhk.co/xagogudexo/heQuggi/79941131628.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/social_problems_community_policy_and_social_action_by_anna_leon-guerrero_6th_editionz4uia.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/jikozupuma.pdfIn PDF document text
    • http://guitar.su/71317059423c4dbr.pdfIn PDF document text
    • http://fsfsfd.xyz/4_term_contingency_aba_examplesldu6b.pdfIn PDF document text
    • http://trokot-tonirovka.online/maths_worksheets_for_6th_gradey5v4v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosajeku.myartsonline.com/georges_marvelous_medicine_vocabulary_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/puvupipejodojegalaropupux.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/52199903164.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/wadit.pdfIn PDF document text
    • http://zovutexokisabut.epizy.com/sanuvovafopajizinaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/16180263654.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16F 4924 bytes
SHA-256: 3fcb0e70026b9c59fa98bc5401e6b1309c9d295a638f90a28f5974e517945589