Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f26ae86cb173a60…

MALICIOUS

PDF

97.4 KB Created: 2021-03-03 23:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 88e620942052e04b8b2d8d991c9adb8e SHA-1: fd17a5b21620f9ff081a59a359daba02f9332330 SHA-256: 5f26ae86cb173a603c47857f60c8e57afe52c68f18795c86e8b26dc7e75e59db
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body is heavily obfuscated and contains what appears to be embedded JavaScript, likely used to facilitate the redirection to malicious sites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=what+is+advancetrac+rsc+2005+ford+explorer PDF link annotation
    • https://tovukofovimo.weebly.com/uploads/1/3/4/4/134485408/pagixu-dezagewapavazan.pdfIn PDF document text
    • https://rudunusom.weebly.com/uploads/1/3/4/6/134602981/gadapenozitej.pdfIn PDF document text
    • https://cdn.sqhk.co/kejalupegem/hjgjfij/hill_climb_racing_3_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/dA0gcgc/mezug.pdfIn PDF document text
    • https://tegedibinatamam.weebly.com/uploads/1/3/5/3/135350324/8432916.pdfIn PDF document text
    • https://pafodezeba.weebly.com/uploads/1/3/4/5/134589846/3362257.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369932/normal_6004f59c7e845.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/eigwgiY/93625219327.pdfIn PDF document text
    • https://genizeregadivov.weebly.com/uploads/1/3/4/7/134709948/fepowevasuzili_zodoliwoxa.pdfIn PDF document text
    • https://xufetujada.weebly.com/uploads/1/3/4/7/134745175/bf15dd.pdfIn PDF document text
    • https://finolija.weebly.com/uploads/1/3/4/6/134625313/8250984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490724/normal_5fe881fe58818.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/AfdVhj6/kewojoxuzag.pdfIn PDF document text
    • https://lewovabarififu.weebly.com/uploads/1/3/1/4/131453312/7980454.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/hiMicuQ/60962944171.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tewufadab.epizy.com/acamprosate_dosage_forms.pdfIn PDF document text
    • http://bijiwamosijiw.epizy.com/95454745787.pdfIn PDF document text
    • http://sexukajin.epizy.com/asphalt_8_theme_music.pdfIn PDF document text
    • http://kaxozofevaz.epizy.com/how_to_change_frequency_on_sennheiser_ew100_g3.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_off00013ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA5 5784 bytes
SHA-256: 118ff887729ec382a4d386fcd1067bd6d734afae1c2bc1dcefd04b4c9fb781a0
font_01_sfnt_off00014f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F70 11828 bytes
SHA-256: 8a3d690491229154c401ebb33de7454cc24b4e983ed52d1c97518f490c31527d

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