Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e785f1f51675378…

MALICIOUS

PDF

63.3 KB Created: 2021-02-20 22:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7f9f1b7aecf0df4b23227361b2779598 SHA-1: aa6980c9a2f040f78bfe2ea76275912dc5fd0789 SHA-256: 1e785f1f51675378944b0145b8d137802464a1226e1f171b415d9bf16574dd1f
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used to host malicious content or redirect users to phishing sites. The heuristic firings indicate this PDF is part of a link farm designed to deceive users, and ClamAV detected it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to download and execute further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8278

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/123?utm_term=algebra+1+functions+domain+and+range+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407062/normal_5ff4c4cc6bf0a.pdfIn PDF document text
    • http://pek-24.cc/the_minto_pyramid_principle12smb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465267/normal_603025e2a906a.pdfIn PDF document text
    • http://prizinsta365.website/48106483249poryb.pdfIn PDF document text
    • https://podogavefa.weebly.com/uploads/1/3/1/4/131438056/81edc0458.pdfIn PDF document text
    • https://cdn.sqhk.co/loziromegon/hcohigY/tank_star_wars_legends_comics.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/ggfhgLa/light_me_up_ingrid_michaelson_lyrics_meaning.pdfIn PDF document text
    • http://wildboost.club/driver_finder_crack_3.6.2p5r5t.pdfIn PDF document text
    • https://rakositove.weebly.com/uploads/1/3/4/5/134595637/zigafekosow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410207/normal_5ff29e4716c87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420599/normal_6023670256769.pdfIn PDF document text
    • https://porilijure.weebly.com/uploads/1/3/1/6/131606314/e72eb4ffc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464314/normal_5ff6d37442476.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ce01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE01 5772 bytes
SHA-256: 473745f20587aa899ab5c5c191445fa075eb15d50666870824f4a771b3be7a41

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