Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb002d11b822c1c…

MALICIOUS

PDF

79.1 KB Created: 2021-03-17 04:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f628a3bde749dafe8f17fb05c4d6029c SHA-1: 2607b513451ae433d626fd861481e54d2309a592 SHA-256: 5cb002d11b822c1c8ecdead3d552fa1333752d070be9fcab7c53d2339c1549b1
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam operation. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://baarspo.ru/award?keyword=athens+and+sparta+pdf PDF link annotation
    • https://nonejekorozu.weebly.com/uploads/1/3/4/1/134108542/a0b0c8f45.pdfIn PDF document text
    • http://rujisuki.mygamesonline.org/40236704578.pdfIn PDF document text
    • https://pozefixinez.weebly.com/uploads/1/3/1/4/131454190/9285143.pdfIn PDF document text
    • https://mubajodopiwal.weebly.com/uploads/1/3/1/4/131454521/mijubugom.pdfIn PDF document text
    • http://madawuboso.sportsontheweb.net/kisejeseropotexiner.pdfIn PDF document text
    • https://bemezonef.weebly.com/uploads/1/3/5/3/135389856/01fa72c66f465.pdfIn PDF document text
    • https://cdn.sqhk.co/webaxepibi/a8BUier/piwezutuno.pdfIn PDF document text
    • https://bevotiwi.weebly.com/uploads/1/3/1/4/131437753/weragokotuzajagut.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/tevujisobewigepawir.pdfIn PDF document text
    • https://barutonujumajom.weebly.com/uploads/1/3/0/7/130739232/kamasemopujezagilis.pdfIn PDF document text
    • https://cdn.sqhk.co/kasesiseb/pveSejf/stack_switch_2960x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevejonitu.onlinewebshop.net/bigoxero.pdfIn PDF document text
    • http://wenares.myartsonline.com/19133245914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b116904-7d85-41c4-9cac-2ce7da1fe7ee/hp_laptop_probook_6550b_price_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/681532f0-e9ce-47f3-b38b-66637b0eb002/lord_i_need_you_chords_chris_tomlin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e44a10-7940-4e4e-a8b6-ce75d96611b0/sportspower_premium_10ft_bounce_bowl_trampoline_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c60bc9da-6133-4616-bb6f-7ce0441059c1/bunovorumus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19446a5-3f22-44f2-9632-9c57316f96d1/hp_laserjet_pro_400_m401n_manual.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_off0000f9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C4 5084 bytes
SHA-256: be875c0e14a4069c19998052323e420fb021a4cdb4b108598997053c9c48c316
font_01_sfnt_off00010b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B09 10660 bytes
SHA-256: 95da03651e6b41e93233b96ade7fceaa92266a28a80175e4ea681b241157fdbf

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