Malicious PDF — malware analysis report

Static analysis result for SHA-256 a126c0f4e207502b…

MALICIOUS

PDF

80.4 KB Created: 2020-12-16 23:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0b1d63f93d18e5336bd8c1502b4d604b SHA-1: 9d69f29f39c09d16de8dfcfab9078f61bf9ad834 SHA-256: a126c0f4e207502bb5aac44b3c506540016fd44dacf467a3b9bb55981d321f36
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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
  • 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://traffnew.ru/strik?utm_term=watch+the+predator+2018+online+free+reddit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370525/normal_5fcef590713d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405413/normal_5fd14ae157b33.pdfIn PDF document text
    • https://xakexoxos.weebly.com/uploads/1/3/4/3/134307698/xufipibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447669/normal_5fa105f11f8b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5fd172f326357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f99d908a4746.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/5fbf50e6fa04221c711701d2/1606373611135/19370128769.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d4c78139af037644e8c4/t/5fc20aafcb3e0f57719715a4/1606552240607/37927937982.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/2811254985.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc504ca17e7202640047e96/t/5fcbf2192bc78848529da5cc/1607201310694/73426391811.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4f6c145a8629dca780a2/1606373230168/goto_keyword_in_python.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13e7dd49dd12447366960/t/5fc44daa61e25426e1c130fc/1606700459841/understanding_your_local_union_bylaws.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e94db748-856c-4e77-9503-3a69b8ea88e8/themes_in_beowulf_poem.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5090ce9fc3622d53c86e6/t/5fcbb0ac0814be4f73eefca0/1607184556473/kedilunuboxelubesuzatu.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/gekijuxivimapumexelojika.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15c11ea4a794d564840ae/t/5fc5fe143c02f22b9ddabc43/1606811157111/animal_farm_chapter_3_questions_and_answers.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_off0000fa47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA47 5600 bytes
SHA-256: b49237f718ca416974ec7ac9a3bad490822937e084150e8834fa413a3eb472b8
font_01_sfnt_off00010d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D63 11468 bytes
SHA-256: ccf026eba0e40cd411ebd0391acb1d54c56fdfe5303a7d6a2e0c07c730dbc307

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