Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ab7fade1e1b08c…

MALICIOUS

PDF

74.6 KB Created: 2021-06-01 16:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4d1ef70e088235da4ee656dcdaa5552d SHA-1: 22246582cc557a446337e5e0b864a75f6bb5c168 SHA-256: 85ab7fade1e1b08c0dd51a733f3c8adac392fb48f136846a959a95c9173f1607
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of embedded URLs, many pointing to disposable or link-farm hosting, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cructi.ru/pbw?utm_term=hiit+for+beginners+full+body+workout+-+no+equipment PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416510/normal_60385b59ab1cd.pdfIn PDF document text
    • https://sidafixeruj.weebly.com/uploads/1/3/2/6/132681612/8669971.pdfIn PDF document text
    • https://tusubolamofe.weebly.com/uploads/1/3/5/3/135322079/jotanofe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420248/normal_5feffa5f38b6e.pdfIn PDF document text
    • https://vekafikag.weebly.com/uploads/1/3/5/9/135986004/nufijoxivaxanej-xebugifixupitew-nowidunegupumus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473064/normal_5fe92dba6fdae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_600ffd0ea4a65.pdfIn PDF document text
    • https://jigibomafife.weebly.com/uploads/1/3/0/7/130738667/dusoxosufazakuvogube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_6032d0958cd7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493602/normal_5fee530d68c43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pokuwatosat.pbworks.com/w/file/fetch/144454452/67590740076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee73b0f-4fe2-4a0b-ab98-cf919664a50c/fijagiweruloso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cf83976-97f1-4f48-8929-1a0b81af3ac3/miwebewew.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144420459/51806729983.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144415284/hidruro_de_calcio_nomenclatura_iupac.pdfIn PDF document text
    • http://tusawijer.pbworks.com/w/file/fetch/144443706/64009009664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b63430-2496-4b83-bbe9-64718e973a27/31032888878.pdfIn PDF document text
    • http://vosebim.pbworks.com/w/file/fetch/144445857/how_to_make_a_motor_coil_winding_machine.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/f/why_is_my_range_rover_not_starting.pdfIn PDF document text
    • http://pezeliv.pbworks.com/f/kawasaki_kr_150_wiring_diagram.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E8 5668 bytes
SHA-256: e5888f3161e0f58ec7cab2c86af5cfb0951867e2a0d5fb9d36b91f90ebda176e
font_01_sfnt_off0000f930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF930 10336 bytes
SHA-256: 065f3a1319d9edd134d915dceedacacb8b8777dd712e226a3a268ed52317babe

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