Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb235736edf9ead…

MALICIOUS

PDF

27.2 KB Created: 2021-05-12 01:22:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5e123ddb3b1b82696da562dfaf100b99 SHA-1: 09c0e4084c750540d4f3a6ee00b7f57ade42d13b SHA-256: beb235736edf9eade0578e8f3b95ebaa95276e4f36b7b711acf90720c98c0edd
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, directing users to a malicious URL. The document body also contains a call-to-action phrase and the malicious URL. While no scripts were extracted, the presence of a malicious redirector link and the lure suggest an attempt to download a second-stage payload.

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 https://netcdn.xyz/app/431946152/roblox-lawsuit-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_off0000161a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x161A 23352 bytes
SHA-256: 182ace5683d9609077603fc2ca3a7f13d75ef8ec76ae4624b9bc958d7b595736
font_01_sfnt_off00004ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AB1 17680 bytes
SHA-256: 68e9623029c2fca8221ee2cac783d537e10dece9a077297720dca680e7d8b4ac

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