Malicious PDF — malware analysis report

Static analysis result for SHA-256 64cb8ea2721f9d4f…

MALICIOUS

PDF

63.8 KB Created: 2021-04-01 03:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b61be3b423fc6b34116df9569706ae04 SHA-1: 3f7cca7fdd6f954e83fa32360e5b03535d47cb30 SHA-256: 64cb8ea2721f9d4fc0dd3e2f8f8a667670fb80c70d6a9d618b86be2243cc2479
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable hosting and link farms, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://seumenha.ru/award?keyword=abbvie+logo+pdf
    • https://mafetoga.weebly.com/uploads/1/3/0/8/130874134/dalapelujumilu-nujidolexilebu-vesizowumij-nipapim.pdf
    • https://cdn-cms.f-static.net/uploads/4379474/normal_5fd2c08d58384.pdf
    • https://cdn.sqhk.co/menaleratupo/VibMjeb/galozemaziw.pdf
    • https://cdn.sqhk.co/gisatajofo/gJii1HR/grand_theft_auto_5_gun_cheats_xbox_one.pdf
    • https://cdn.sqhk.co/gubisagebuto/Nhihee5/senumafabebojusifexeladun.pdf
    • https://cdn-cms.f-static.net/uploads/4404965/normal_605566197ad7b.pdf
    • https://static.s123-cdn-static.com/uploads/4389366/normal_5fc63bcccd136.pdf
    • https://kagopibuxewiki.weebly.com/uploads/1/3/1/3/131398156/9317702.pdf
    • https://fofevupug.weebly.com/uploads/1/3/4/4/134490210/1d931fd539c60b.pdf
    • https://cdn-cms.f-static.net/uploads/4372723/normal_6064e8492833e.pdf
    • https://cdn-cms.f-static.net/uploads/4412158/normal_602a0d693baf2.pdf
    • https://cdn-cms.f-static.net/uploads/4487208/normal_5fd2d447e3653.pdf
    • https://cdn.sqhk.co/kofosenolo/jehbjb5/cable_management_desk_guide.pdf
    • https://jevoweli.weebly.com/uploads/1/3/5/9/135958856/86d416f83.pdf
    • https://pubogovivewata.weebly.com/uploads/1/3/2/3/132302724/poxelavalarikizo.pdf
    • https://uploads.strikinglycdn.com/files/0d492a2f-1b07-4d5b-a11c-395893e4f5e0/48192348470.pdf
    • https://uploads.strikinglycdn.com/files/aa404f97-18fc-4d21-b9ed-ad18c4a0b9f8/principales_problemas_economicos_de_mexico_2020.pdf
    • https://uploads.strikinglycdn.com/files/7d482e62-3d6e-45cb-8c4f-790543b23d83/kazufutisoka.pdf
    • https://4f6c49ad-35c2-4e1b-a50e-a4ca4816ee30.filesusr.com/ugd/a28dad_0688f2a115874ee0842f794bf96009c4.pdf?index=true
    • https://00eaa6b3-f026-4720-b00f-fafb40066352.filesusr.com/ugd/d498be_37326ed9316d4c978074319d62ae2172.pdf?index=true
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_793a4c27dc644c208a6b3f2086b9b59c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/15118c9d-dd87-49fe-a4e3-e061c1e10991/vivasugokabovijadopud.pdf