Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0d26dfd7e67a32…

MALICIOUS

PDF

66.7 KB Created: 2021-02-24 22:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 679387a03e5747ccce469cc288629134 SHA-1: e9d908ec027795f5d23dd7e0617af8e13ebecddb SHA-256: 6b0d26dfd7e67a32bff486172321c00d07a57be65852ca003f5113d06ddbab8f
156 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malicious content delivery attempt. It contains a large number of external links, suggesting a link farm or SEO spam tactic to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards an attempt to redirect users to malicious content, possibly leveraging embedded JavaScript.

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://seumenha.ru/strik?utm_term=how+to+add+camera+summer+baby+monitor PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374013/normal_6002452b704f5.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/bergeys_manual_of_determinative_bacteriology_latest_edition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374373/normal_5fc6933cbfcfe.pdfIn PDF document text
    • http://timinome.getenjoyment.net/xefuzewumulukoniwidunoki.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/hf6Dygh/video_fake_call_simulation_for_ice_cream_man.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378604/normal_60094fece6477.pdfIn PDF document text
    • https://cdn.sqhk.co/wobivada/0iaUgiC/mike_v_skateboard_party_2_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411229/normal_5fc7c47cc5b4d.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/hesgiic/academic_word_for_pet_peeve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465393/normal_602c0d5f54a22.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/1cf29073.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/jaMYse0/heroic_fight_1986.pdfIn PDF document text
    • https://cdn.sqhk.co/joremeve/dghhjjb/93605928887.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saxodanokijaj.atwebpages.com/how_much_should_i_charge_for_writing_a_500_word_article.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_off0000c932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC932 5348 bytes
SHA-256: 01f8e9b168742ce81febb5f3d413f5e6fff3d237c7ae8d2ba92519b82bb6faa4
font_01_sfnt_off0000db5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5B 10064 bytes
SHA-256: 7a6a2f16652889d86db37ebce4fc97d7d09216d4e9ccba33f0be4529bcc368ef

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