Malicious PDF — malware analysis report

Static analysis result for SHA-256 66122e92901b6a7a…

MALICIOUS

PDF

73.3 KB Created: 2021-03-02 06:27:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dce8ebd9a1da74798e6ce81f6aed9911 SHA-1: 5708271ced1ab850bc88fd2d5051c2a513dc9326 SHA-256: 66122e92901b6a7a620abf0af840f860100ef51fd2f518ef5c34b91d81c46b98
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://gimoguvi.ru/strik?utm_term=what+food+has+2000+calories PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387218/normal_5fe2ae4d0360b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477638/normal_602ed46d9b1a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393356/normal_5ff6a5ac4cbab.pdfIn PDF document text
    • https://faluwesidiji.weebly.com/uploads/1/3/0/7/130738597/tepuwutokivifup-wuvax.pdfIn PDF document text
    • https://cdn.sqhk.co/sewuvavimebi/iehhbif/16114410579.pdfIn PDF document text
    • https://foserexekoxa.weebly.com/uploads/1/3/0/7/130740627/327958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408879/normal_6016ac7eb0e1d.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/edciahc/dakoxunanetazebofepixasu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382790/normal_5feb75976c784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501660/normal_603cc79330407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415304/normal_5fdbd5b13ce04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486374/normal_5ff5cddb4147c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491945/normal_5ff86fe539a06.pdfIn PDF document text
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/4374494.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378604/normal_600775bc4f068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467561/normal_600ee7e1c6029.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393370/normal_5ff3fbd2cd842.pdfIn PDF document text
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/xezegezuju_sexisafifome_zutixes_tebilaripufeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jivamubug/nizedorurizazuzodoj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF8 5396 bytes
SHA-256: e55815a19a284e311e3a33481d09b9e496231caabf108d132cb6bfa7c8f48cf8
font_01_sfnt_off0000f25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25C 11120 bytes
SHA-256: 917b63609b68c8dfeaffdc41397edf8e011a188030206c85b87298ef3697b276

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