Malicious PDF — malware analysis report

Static analysis result for SHA-256 64fd820a2844084b…

MALICIOUS

PDF

172.2 KB Created: 2021-03-21 00:27:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 72fcdf16056062a60cc990f38179826a SHA-1: d12dc6aeb39e895625e8b51023bce44bddb3ff33 SHA-256: 64fd820a2844084bfa467a9aab28978053f16237346250a86c422205b1ad414c
124 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, with at least two pointing to potentially malicious domains ('golowaki.ru' and 'mygamesonline.org'). The PDF's structure and embedded links suggest it is intended to redirect users to external sites, a common tactic for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

Heuristics 4

  • 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
  • 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://golowaki.ru/award?keyword=atmospheric+correction+in+remote+sensing+pdf PDF link annotation
    • http://kafalukuwemi.mygamesonline.org/rifididisajisol.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/43578151663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_6047dfaf4b43f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469365/normal_6048a75fa48d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bae171b9-7924-4e91-8ec1-cd8eec8ee3e4/jukate.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/jafimazupijurej.pdfIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_9bde4936572b44c6910995aaeaaaf13f.pdf?index=trueIn PDF document text
    • https://1f155014-1e6f-4189-ab95-3679d9c2160a.filesusr.com/ugd/9b7d8a_cdcc4f38c2d7406883f1597472301c66.pdf?index=trueIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_2da1bd67e243485fb8ac5c0d9204abec.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cbab414-403a-4aad-ba37-ce18d80984f5/57256821523.pdfIn PDF document text
    • http://saboveliga.myartsonline.com/2011_honda_pilot_repair_manual.pdfIn PDF document text
    • http://supajiwa.myartsonline.com/1200_calorie_low_carb_diet_plan_for_weight_loss.pdfIn PDF document text
    • http://fogokenum.onlinewebshop.net/articulo_de_opinion_sobre_el_feminicidio.pdfIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_28fea2e5ff0449fab8f7e30f8767a88e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4eb7955-9d28-4831-b6c2-ae9a87e6d8c6/does_foot_size_indicate_height.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56649dbc-2e02-49ec-bdd7-911515005fda/zokimubuvixot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f50e64e-963a-4717-ad05-e22b1cedab8e/total_flow_rate_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/how_to_use_airplay_on_samsung.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_off00028be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28BE4 5316 bytes
SHA-256: d80609dff3a11a6aecf21f89a5154ee916f2423b6daa153e098e9fedd09fd06f

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