Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a13f02a57286ac…

MALICIOUS

PDF

42.1 KB Created: 2021-06-11 00:44:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9c14815d51dc41234eacf8314dfd6056 SHA-1: c89e51a015b77151175a6b9d54165c7aadfda710 SHA-256: f9a13f02a57286acd02a0bb7ccb74eb7ffc6996c58e1aa83e916ec9856dfc2f0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game cheats, directing users to a URL associated with malicious redirector infrastructure. The document body text and embedded artifacts suggest a social engineering attempt to trick users into visiting a potentially harmful site. No scripts were extracted, but the primary attack vector appears to be a deceptive link.

Machine Learning

  • Nyx PDF Classifier clean score 0.0361

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.tw/app/431946152/roblox-lumber-tycoon-2-cheats-pc-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_004_off00003f1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F1B 28176 bytes
SHA-256: 8d6f8912c7522d0f76ee71826a948c30212908706456469149ba1d208ae4c37a
font_01_sfnt_off000080bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BB 19140 bytes
SHA-256: 42b833fe004d0ed45dcc2adb40363b21dfaa3be6c353c89164ec5f49c2a9af39

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