Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b4c88e8937e079…

MALICIOUS

PDF

32.5 KB Created: 2021-07-19 01:13:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1e011b4c3c53e9128ccb4aeb16b535dc SHA-1: 0a94cf23f068b1ba423757778043f0daf2d29866 SHA-256: d2b4c88e8937e079edb1fcc5cb5af1e90fe54d6819c2f66fb8305f3595684200
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and generators. The document body and heuristics indicate a lure for free Robux or game cheats, leading to a known malicious redirector. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9452

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.tw/app/431946152/roblox-hacked-com-2021-game-hack In PDF document text
    • http://haertetechnik-steinbach.de/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/free-robux-master_GM431946152.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/how-do-i-get-minecraft-for-free_GM479516143.pdfIn 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_002_off00002713.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2713 22820 bytes
SHA-256: 5492882df6bbcb69829004deb6e502e14e9b1a81e83a1db397bfb85d47405d24
font_01_sfnt_off00005a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A45 19204 bytes
SHA-256: a843c5ca876463c5b8999cf5589cf4aa204d9a964b83c691331fb87130c2a057

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