Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ff25d9d8e9336f…

MALICIOUS

PDF

67.1 KB Created: 2020-12-28 00:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da640bd7bb92edf94dc97cbbb81458e4 SHA-1: 82011aad9c7050b8664e5db0a4ee603d98c84f0d SHA-256: f8ff25d9d8e9336f7a5b89006beb95828c37dacef0bd6ce27ac15cee8b67154f
212 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate that this document is designed to distribute malicious content or phish users by directing them to external sites. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8940

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=missiles+balistiques+definition+simple
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/de3ec03b0.pdf
    • https://ruzunaxatan.weebly.com/uploads/1/3/4/3/134340268/wefabutofarage.pdf
    • https://cdn.sqhk.co/gupidiroka/Tb9suar/art_therapy_salary_monthly.pdf
    • https://nimateson.weebly.com/uploads/1/3/4/8/134881528/rofebajotunetobu.pdf
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/4a0932.pdf
    • https://fibavizenimi.weebly.com/uploads/1/3/4/4/134485548/2fd6e8df.pdf
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/1183494.pdf
    • https://cdn.sqhk.co/pevukoza/efifMfT/daniel_powter_bad_day_genius_lyrics.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b5a369e3-120a-4a9f-b377-5354846582bb/btd_6_hacked.pdf
    • https://uploads.strikinglycdn.com/files/be3f6f6c-f80a-42e5-8b2b-bd3425cc09c0/68237961525.pdf
    • https://uploads.strikinglycdn.com/files/a6048d14-1af7-49b9-a5b5-2356c854d349/ralph_craft_city_runs.pdf
    • https://s3.amazonaws.com/purixifusipelid/dark_tower_wizard_and_glass.pdf
    • https://uploads.strikinglycdn.com/files/1dca59c5-3ad5-4511-9616-35243817e1c3/honeywell_quietcare_humidifier_manual.pdf
    • https://s3.amazonaws.com/gopuze/68931166670.pdf
    • https://uploads.strikinglycdn.com/files/3ca9da17-963f-48f7-8912-cceb653aa1ae/xifuwi.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faa5.bin
e08f3a49a4d671878b39593be864d0687153d59ae6a907a4b5e0652d51c993e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA5 5360 bytes

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