Malicious PDF — malware analysis report

Static analysis result for SHA-256 e813a15f4c5582d2…

MALICIOUS

PDF

40.9 KB Created: 2021-05-21 17:42:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 025837c884133470fedae54dd29570a8 SHA-1: 11e39c930c0d1bcdef12dc4eb757aa3e43a337b6 SHA-256: e813a15f4c5582d2896255ca3a4bc2d6b9ab984bb72d310a7f741b22fedfbb9d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering 'free generators' and 'game hacks', specifically mentioning 'Robux Hacks 2021'. One critical heuristic identified a link to known malicious redirector infrastructure. The document body also contains a call to action to 'CLICK HERE TO ACCESS ROBLOX GENERATOR'. While no scripts were explicitly extracted, the nature of the lures and the embedded URLs suggest an attempt to redirect the user to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7445

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/robux-hacks-2021-game-hack In PDF document text
    • http://muckrossparkcollege.com/images/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://muckrossparkcollege.com/images/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://muckrossparkcollege.com/images/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://muckrossparkcollege.com/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://muckrossparkcollege.com/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31BF 27160 bytes
SHA-256: 6d151aec6ae2c04c9162857b09b08c94879cae356c302378e84d324e550e0db2
font_01_sfnt_off00007004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7004 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00007d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D15 18648 bytes
SHA-256: 03ab0df94635c5ebeb05191dd2fda9aa410ed650044dc459735f8f7cc99ee4ee

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