Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f07ec389e86d79…

MALICIOUS

PDF

75.3 KB Created: 2021-03-03 08:03:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3fc084abd8070ae27a2a74bbb5472f1c SHA-1: 571f6c459169e8b98427250841c1588fbe7fb347 SHA-256: a2f07ec389e86d790bd1a2c322fce3881668f5438e7e2451dbf02a40397decb7
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of a link farm designed to improve search engine rankings. One prominent URL, https://lozipotod.ru/wix?keyword=call+of+mini+zombies+mod+apk+latest+version, is presented as a download for a game mod, indicating a phishing or malware distribution lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing a trojan.

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://lozipotod.ru/wix?keyword=call+of+mini+zombies+mod+apk+latest+version PDF link annotation
    • https://soxapibojewaw.weebly.com/uploads/1/3/5/3/135345372/9033002.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383131/normal_5fc66ea4784da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417653/normal_5fccb7a207267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5fd8d70a4018f.pdfIn PDF document text
    • https://firalikagux.weebly.com/uploads/1/3/2/7/132740609/xawetiguxapu_zipedalizin_rovufepifi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485318/normal_5fdd74f045ec7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450158/normal_5fe198c6307a6.pdfIn PDF document text
    • https://cdn.sqhk.co/loxusovi/nBjgghn/amazon_kindle_fire_trade_in.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/8ePxhaI/mezewikise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408476/normal_6029776176320.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/votubukaxogilix/46730865224.pdfIn PDF document text
    • http://magomodatibotu.epizy.com/asokan_inscriptions.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/daily_astroguide_deccan_chronicle.pdfIn PDF document text
    • http://gabigirinekib.rf.gd/ratijeji.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/3759490860.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_off0000e96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96B 5404 bytes
SHA-256: 8faef6a76f439ab52f613fd265b2ed8c8de7efd6e0867b41332db8b4fe0c3a14
font_01_sfnt_off0000fbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC0 10580 bytes
SHA-256: 18ef683205db522fce42805ad37d663a64fdc97da6631635aa2aa1f3f3e08399

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