Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf76441370eba426…

MALICIOUS

PDF

68.3 KB Created: 2021-03-10 10:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 545b854baccc6ff16e9c71308c40df40 SHA-1: b7544ee255c08c76418c1669649f6dab5bfffa11 SHA-256: bf76441370eba426985b93bfaa97408d1a49ea4c6a3d97546ffea9dfad267f93
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 0.8294

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://bologen.ru/strik?utm_term=where+can+i+throw+away+my+washer+and+dryer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426572/normal_603ac3549abc7.pdfIn PDF document text
    • http://fonudesuwobulud.mygamesonline.org/teoria_de_enlaces_quimicos.pdfIn PDF document text
    • http://penafur.scienceontheweb.net/80793510620.pdfIn PDF document text
    • http://korefubelexusiz.medianewsonline.com/identical_ellen_hopkins_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/qELgjDM/4266094961.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/jfieNbl/amazon_prime_video_apple_tv_not_loading.pdfIn PDF document text
    • https://cdn.sqhk.co/sukonazukuv/p1gehev/color_switch_brush_cleaner_review.pdfIn PDF document text
    • http://cetop.xyz/how_to_use_ac_remote_control_sansuig3b58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501975/normal_5fd9881c33a40.pdfIn PDF document text
    • http://gratoramaa.website/33133044815k313i.pdfIn PDF document text
    • http://farozemirig.scienceontheweb.net/definicion_de_arte_segun_autores.pdfIn PDF document text
    • http://picply.ru/kasimozepefudobanawamugi7myqv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466666/normal_5fdedd7dca8d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498986/normal_5fe6785615aa3.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/iuQhzje/stickman_shooter_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469617/normal_5ff37cdb856c4.pdfIn PDF document text
    • http://fajamad.mypressonline.com/imperial_leather_mcclintock.pdfIn PDF document text
    • https://cdn.sqhk.co/koluvukirate/V8tifia/97624886401.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/saul_alinsky_rules_for_radicals_summary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kifesafijupesob.onlinewebshop.net/full_marks_practical_skills_in_science_class_9_download.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_off0000eeab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAB 5352 bytes
SHA-256: a9b432f9c8b586e4aedd4899ac70feb678de7e3dc9fb258f9e1aa7156408f1c1