Malicious PDF — malware analysis report

Static analysis result for SHA-256 364fc32eefea684e…

MALICIOUS

PDF

28.1 KB Created: 2021-06-25 20:41:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 47cd5e61539d6a8d0b462612d1cbd8c2 SHA-1: a8e907acee8d544910f6562a725862f0e9b754c6 SHA-256: 364fc32eefea684e57601748997e4be11eb6c43eac8381209c72a33a3b6d6aaa
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector lure, specifically advertising game hacks to entice users. The embedded URL directs to known malicious infrastructure. No scripts were extracted from this sample, but the document body and heuristics strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0330

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://netcdn.co/app/431946152/roblox-cheats-and-hacks-no-download-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off0000154c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x154C 22980 bytes
SHA-256: 006cb45c37584e3986e12eace07ee0140a7535cd8c8a9127f75885d55330dc3d
font_01_sfnt_off000048c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48C9 19432 bytes
SHA-256: fd4b8c4eb724161814bbcca26e82c12dbe8292c8d9e367235dc2e92859831564

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