Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bda98fd0e362ee2…

MALICIOUS

PDF

62.3 KB Created: 2021-02-25 03:17:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: efaba19844b350bcc10cbf0637ba59a7 SHA-1: 1f3e1a022538cd2e643868670b189674a3e0bfc3 SHA-256: 0bda98fd0e362ee291dc559b2c60ea0456c25ecfee007b04b3c7251f29e7030b
124 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URLs and the heuristic indicating a link farm on disposable hosting suggest a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a book title, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8124

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
  • 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
  • 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/award?keyword=reality+transurfing+by+vadim+zeland+-+steps+i-v PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489976/normal_5fe5d5607f9b5.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/3012744.pdfIn PDF document text
    • https://cdn.sqhk.co/mugukawi/dUiahhz/futuvuviropakozug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465015/normal_6015c4bd9f05e.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/0qShaja/zoo_guardians_walkthrough.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/72573945161.pdfIn PDF document text
    • http://azorocheat5.xyz/63759333864tcyr1.pdfIn PDF document text
    • http://verifiedbadges-form.com/rabbit_domain_kingdomvcpsz.pdfIn PDF document text
    • http://avto-document.site/infection_control_policykmn8g.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/31268077280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505125/normal_602d77e025f67.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/zurovajij/prime_mechanical_engineering_pocket_reference_manual.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/mastercam_x5_lathe_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/63645293179.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/reported_speech_with_questions_exercise.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE299 5524 bytes
SHA-256: d794d649cfd7f529f59a32c88168141903fd87fb72bfa4e77dafd43b0db70b6f

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