Malicious PDF — malware analysis report

Static analysis result for SHA-256 937972728b03bed0…

MALICIOUS

PDF

67.6 KB Created: 2021-02-03 02:14:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d0df4af1c1cebb77070460ed1bf0708b SHA-1: 1bd81162da3b9b1b9872496d68ff77d0e3d919b9 SHA-256: 937972728b03bed0879ce7072f3bf5c3006c08ffc60f2fb9d778cd83a3f2ce23
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is not a legitimate document. The ML classifier and ClamAV detection further confirm its malicious nature, likely serving as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9705

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://seumenha.ru/aws?utm_term=caldera+peisa+unica+manual+instrucciones PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375210/normal_5fe315011bd13.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/hgpdR4v/wumagakozotiv.pdfIn PDF document text
    • https://cdn.sqhk.co/nerutadege/igGyhf2/football_soccer_star.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/cpZcE0A/sebifalogamevawiponelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459318/normal_6019d15a99750.pdfIn PDF document text
    • http://lnstagramcentre.net/rapunzel_short_story_with_picturesw85ob.pdfIn PDF document text
    • http://smartbright.club/science_lab_for_kidslci9q.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/ijaibtJ/72603100996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463809/normal_600b383045779.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/FhfifhY/63628692726.pdfIn PDF document text
    • http://temppicture.xyz/96848686376g97sp.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/CidSnia/7891924424.pdfIn PDF document text
    • http://hargotel.xyz/117082343111l6xj.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/hmsuihc/xapegoratinoxakaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://winavetipi.epizy.com/amanita_muscaria_trip_report_erowid.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_off0000ea60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA60 5124 bytes
SHA-256: 9763a72d1c1e8c6313b521bf7fd9b9c42955c5e39e3bbbb7caa6ee7cd0506618

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