Malicious PDF — malware analysis report

Static analysis result for SHA-256 f806634e2da20ea4…

MALICIOUS

PDF

79.8 KB Created: 2020-11-30 00:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0108cda1707f2f6b51b54e732e483797 SHA-1: d59dce850cbc1c60ee036de21f9c8780e4a79c8b SHA-256: f806634e2da20ea4a67a0d011223704be07cad0c4f864b3d76e2542fc1f5275a
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://trafffi.ru/strik?utm_term=the+glen+movie+theater', suggests a potential phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://trafffi.ru/strik?utm_term=the+glen+movie+theater PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5fa31b10cdbe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427095/normal_5fa43369824d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f88b3a758220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_5fb2528c0cc50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468836/normal_5fab61924a55e.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/6741250.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/wabunuridojoji.pdfIn PDF document text
    • https://rezolokad.weebly.com/uploads/1/3/4/7/134718373/wugakisas-norex-lemikizoxoxisa-dixewanu.pdfIn PDF document text
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/314fbbee6.pdfIn PDF document text
    • https://buxivadoga.weebly.com/uploads/1/3/0/7/130740323/15a128be9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jadere/8065176360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abb250d1-4064-46f9-b00a-59ec71b4c871/moore_norman_vo_tech_penn_campus.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/caveat_petition_format_supreme_court.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deea3349-6388-4876-b51d-cec657d2f1f1/diwizowewebukom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff790099-f5eb-4f68-bf93-7675d9d05e4c/matojuxofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac4e782-a6c4-4012-a4ef-fbd8dd9de25c/39389374638.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EB 4716 bytes
SHA-256: e175e7df5de688b9e1367c32762fe6ff81863e6b51fa8572aa24eacf5489820a
font_01_sfnt_off0000e5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BB 11400 bytes
SHA-256: 573ad4b0dcd7f0cf020a9fc7ebe43adc613b28dec3a2808dd6ea8a182b2476aa
font_02_sfnt_off00010c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7B 17072 bytes
SHA-256: 418a1a01a27b0ecbd54312a2e58cbfbb142b06573bd32b23588e44f3f36cbfdb
font_03_sfnt_off000123cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361