Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0932ead3c7ed90c…

MALICIOUS

PDF

78.4 KB Created: 2021-03-25 02:47:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 64aff3ee16ce56575d3c307166b483da SHA-1: 83b5df1fe23cb2fd14707ebae21430f1f93f6d6f SHA-256: f0932ead3c7ed90ce3832bbf5219bf3421bc4abde215b480ea0a2b88cf6b087d
186 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 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://botokaw.ru/strik?utm_term=flow+chart+creator+free+software PDF link annotation
    • https://cdn.sqhk.co/bimonabozo/4gdGXhe/airport_operations_control_centre_dubai.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/dft0ghJ/siberian_husky_size.pdfIn PDF document text
    • https://cdn.sqhk.co/zagekexeroze/gdigjfP/cool_facts_about_human_body.pdfIn PDF document text
    • https://bujufanabatoxiv.weebly.com/uploads/1/3/4/5/134598972/2628904.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/fTbbWNK/ball_smasher_mod_apk.pdfIn PDF document text
    • https://zezowamizafomex.weebly.com/uploads/1/3/1/3/131381240/2ade81371ca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481157/normal_6040e94bd3207.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/ciemPqA/ripawifuzonosijupizujav.pdfIn PDF document text
    • https://gesivakegozuk.weebly.com/uploads/1/3/4/7/134768451/juvijavuzokom.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelojid/jdihK5g/dexafozirozam.pdfIn PDF document text
    • https://daxixerok.weebly.com/uploads/1/3/4/0/134000062/7760049.pdfIn PDF document text
    • https://pevetuximamit.weebly.com/uploads/1/3/1/6/131606263/b70c536.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379032/normal_60097abfab0ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455669/normal_5ff69130d971b.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/qphijhi/mibewavotuguxajavukiza.pdfIn PDF document text
    • https://cdn.sqhk.co/foxoxaze/gcvJ8ge/60401204003.pdfIn PDF document text
    • https://cdn.sqhk.co/relewimimoro/RYcjgjd/kotor_guide_gamebanshee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_601c94d8698ef.pdfIn PDF document text
    • https://tajamexuzoxobug.weebly.com/uploads/1/3/1/4/131410736/00428d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF488 5016 bytes
SHA-256: 2e9bdefdd3fbfb70eb4234b6943d8c9485793a659682012ee4ff95bff1c41061
font_01_sfnt_off000105a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A7 11352 bytes
SHA-256: 3b9d5d2d8d12822bdef8999d3656c051c332b85d164fdb5a4270217b7f277d25

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