Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca0a09661fb5f69…

MALICIOUS

PDF

74.4 KB Created: 2020-12-29 16:05:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6e1d6db62fb89da37b8985e60629fd89 SHA-1: 10840e017f01a2070f5e254e2ab5160824b6277e SHA-256: bca0a09661fb5f6991c8e66cfb357a7173214b1bc85574c742b429124113fea0
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://trafffe.ru/strik?utm_term=world+war+1+timeline+activity PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387232/normal_5f943cd9787d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479673/normal_5fca419015ba1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387232/normal_5f9692523b82b.pdfIn PDF document text
    • https://bufopavebusi.weebly.com/uploads/1/3/4/8/134853568/8552926.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://uploads.strikinglycdn.com/files/9037254a-0924-4954-8637-3b3e01cec52d/xutosukemanotekupifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d423fc9d-ab99-49b7-9d98-e29fed8684c4/40693628562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e4fb7f-9acc-4c14-85ea-cbf6acaf8293/cotton_candy_nail_polish_designs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3738805d-efba-4a50-985f-63e105dbd517/shadow_warrior_ultimate_fighting_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12c70a7f-7561-4d84-a04d-d4c327cb8afd/gowufukujezotijoruv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/872c3b49-6d63-4572-8f8e-9b16d40104d5/62490449129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/214fb163-ce49-4e42-9283-45c0aee094f1/60317049903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b4240ac-d33e-4a07-8b11-60c05da2269c/27515110940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2829dd1-9bfa-4df6-b2bf-242820d8b143/zuxifuwaretetube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/407eed89-3d99-45a0-9c45-440b468cc022/chi_13104_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93e6414-6360-4f48-ac5d-80ce0f2858ce/punepufexarotaregug.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA90 5016 bytes
SHA-256: 73d06032b0d63a490059f83f0f3d23e50deb7ed3d4beaaee198257ca43187ac3
font_01_sfnt_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 10356 bytes
SHA-256: 38b33f7a8fc847cc17cc1b8f7421f1fe11412051159214d42022a157f38c2343
font_02_sfnt_off00010e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E56 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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