Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4cd4a6e0994fcb4…

MALICIOUS

PDF

64.6 KB Created: 2021-01-24 17:49:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 643a17a97b42f3c5d313524867864f87 SHA-1: 9aa7792e869e5d186b471163ab6d9fa81a0613f3 SHA-256: f4cd4a6e0994fcb46fa5ee2d18e5fe8ae89d674b03706324716cfb844b58c073
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical detection score. It contains an embedded URI pointing to 'bologen.ru', which is suspicious and likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'Joshua tree bouldering guide book PDF'. No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly indicate an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/123?utm_term=joshua+tree+bouldering+guide+book+pdf PDF link annotation
    • https://cdn.sqhk.co/disumuneriva/gchhHZD/14735804279.pdfIn PDF document text
    • https://cdn.sqhk.co/mobirewin/d1hgfTm/sewoboxaxalezuvetot.pdfIn PDF document text
    • http://copyright-central-media.com/woodworking_plans_projects_magazinehvtyn.pdfIn PDF document text
    • http://daddytestit.xyz/steam_link_as_chromecastxioru.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/RidJ4jd/nintendo_switch_online_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/kekumumaxow/iPgfoWs/32770302098.pdfIn PDF document text
    • https://cdn.sqhk.co/desiruzag/CgcqNjf/23214267832.pdfIn PDF document text
    • http://evatopshop.xyz/cut_the_rope_experiments_mod_apk_revdlmbqqu.pdfIn PDF document text
    • https://cdn.sqhk.co/wexufenu/jBPTiii/23810047310.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/iiLijiC/88286786373.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392218/normal_5fc5c4ccd4d20.pdfIn PDF document text
    • http://airbin.top/70142209289nidsn.pdfIn PDF document text
    • https://cdn.sqhk.co/loxepafigav/IWQVyhc/delububorob.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/jowutoneranemuk/kikuvuzabuv.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/rukorujopifiva.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/kevowam.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_off0000bf5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5C 5496 bytes
SHA-256: 6a2133661a0ac610a0afda1f5b548e9339c06bbed5aed1b1aebfdfc1daa82be9
font_01_sfnt_off0000d1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F8 10352 bytes
SHA-256: 410ba17e7451ccfaf19a6fde40ee97b9a5784e80c6777d3a7372a7832a6094f2

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