Malicious PDF — malware analysis report

Static analysis result for SHA-256 360f135e2efc36a5…

MALICIOUS

PDF

69.1 KB Created: 2020-12-15 05:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 389c966175db2080cfd2c80641458d2a SHA-1: d5c766055919888ff2c4e30df86abcc90bf195b6 SHA-256: 360f135e2efc36a58f4e5d8ea1934ee3e1900c7b60ad4bfccf8a2a4e76581d89
156 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. 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 5

  • 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 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.
  • 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/123?utm_term=black+satin+dress+shirt PDF link annotation
    • https://fomomeku.weebly.com/uploads/1/3/2/7/132712435/limudikixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_5f8fae274311e.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/dezevu_sagadov_donano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414491/normal_5fd7511952038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_5fd69fe3887c7.pdfIn PDF document text
    • https://retinagarar.weebly.com/uploads/1/3/4/3/134319249/bugigonuzezagabujivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382613/normal_5f90813f36238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450721/normal_5fa2c6c5e4fa8.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1441493.pdfIn PDF document text
    • http://www.styleunited.com/TipsAndTrends/article/Tips-on-In 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/745b4cba-b172-4279-9a9a-0fba7f881bcb/ruzepavijanuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5500e1-160c-4d4a-a0e2-7b93fe43b8ad/earning_revenue_on_account_would_be_classified_as_a_an.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaaa1986-726e-4487-b8c7-9506b427ba7c/football_strike_hack_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47be825e-b8c3-4ddd-8e53-20878183d0d9/tesuwuvakupevimunedal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e00103f-8b8b-4ca7-996a-37abf009e10d/guruzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428e7fba-4057-4540-934a-da95b4bd2bc7/xidudasisebefinaxatu.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_off0000d160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD160 5140 bytes
SHA-256: 2a741a3442628465059c62579bf711bebe03d0370376d8e0b1378e30f60bde8c
font_01_sfnt_off0000e2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D1 10880 bytes
SHA-256: 6b3f0a99e7a26ec10c0c054e6283160be84dff0521339efde5a9459e118d33ad

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