Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62e4afb29e4237e…

MALICIOUS

PDF

73.8 KB Created: 2021-03-09 09:26:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 61e092787707dbc914bfb1a6ae9d75ee SHA-1: 460f784e2120be6a9c8e047377df32ade5d968c7 SHA-256: b62e4afb29e4237e966f6e4aa12dd8faee4aff3a0336ae94369c61f7e396d929
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

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 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/wix?keyword=hardcode+vr+apk PDF link annotation
    • http://zomesotemaxage.66ghz.com/rise_of_civilization_new_talent_guide.pdfIn PDF document text
    • http://suguxilaxiz.22web.org/powerpoint_newsletter_template.pdfIn PDF document text
    • http://xteenware.online/language_development_milestones_18-36_monthsd24ro.pdfIn PDF document text
    • http://ogranicbio.fun/noxeku3yp38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481510/normal_5fec0c6c930a9.pdfIn PDF document text
    • https://cdn.sqhk.co/givujelised/giify2W/19460139326.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/qgeECij/58386510460.pdfIn PDF document text
    • http://organic100.fun/zenafopupm3fu6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492240/normal_5fd703ba044ec.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/ejiheoK/creepypasta_amino_en_espanol_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388428/normal_5fe44b1459e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402722/normal_5fd24051b75c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451941/normal_5fdb829e914e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5fd1f1db8828a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kusotuwomaru.epizy.com/66762331424.pdfIn PDF document text
    • http://xajumin.epizy.com/6296412914.pdfIn PDF document text
    • http://munakazoxan.epizy.com/42697644290.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_off0000e512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE512 4940 bytes
SHA-256: f5d276dc8d933101c173c24373cc156ec5b497dc09465a9d6c66bf5674a7fb58
font_01_sfnt_off0000f5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F8 10696 bytes
SHA-256: 2f56c6242f4cee7ed54e55fd0166baa2ece8aed487bd92b51726793df408228b

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