Malicious PDF — malware analysis report

Static analysis result for SHA-256 3517e58d46f23699…

MALICIOUS

PDF

123.0 KB Created: 2020-12-07 20:58:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 25174d35f1d5316ef6b6da8cdef5d121 SHA-1: 1e439483cc7fcd8236e1d1db7a2859c53c5c5d19 SHA-256: 3517e58d46f23699a9f4f00db8ff912d37477a859ed276bdcf0a38336a3b898a
282 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to known malicious infrastructure and impersonates a brand to phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's content, though partially obfuscated, suggests a lure related to 'biomechanical principles' and includes urgency language, further supporting a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://pemopexo.weebly.com/uploads/1/3/4/3/134305592/kibaxetuvox.pdf.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gettraff.ru/strik?utm_term=what+are+the+7+safe+biomechanical+principles In PDF document text
    • https://pemopexo.weebly.com/uploads/1/3/4/3/134305592/kibaxetuvox.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/7b33a83c024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415944/normal_5f9639d721841.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3b3a3485235c869097e3/1606302522964/83132793801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc0f3de-10ee-4e93-aa48-99dad410fe1b/cloze-ing_in_on_science_organisms_and_environments_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c20f6e8-5d4a-4c6e-b4c8-d5ff8e3642fc/petijenezoviwiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29cfcfca-3536-4469-ad6a-413dc7fe07bd/wenelafifotefarezazuvikad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc39b6c5687f52b6b922f37/t/5fcb98e40814be4f73ec58f4/1607178468741/listen_and_reading_spanish_learn_spanish.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e0febe9b6939510aa6a3/t/5fc25cb908845d0924d69e21/1606573241559/98896185452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3079b020-c07d-46c8-bce5-e8487a953a82/70665928340.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2908dc89e1c4b8fc91e59/t/5fc4014661e25426e1b450e9/1606680908904/tavodu.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_off0001a8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8A3 5488 bytes
SHA-256: 4bf7cf8f24d6eecd302c7270d586842ad0815f0cf4ff3a1eef4354cb7ea45559
font_01_sfnt_off0001bb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB34 10556 bytes
SHA-256: 20d67bd372d80dff14d1af7b46d720aae2e1a16338c0457537b32bad9cc75f33

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