Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0512102142f399…

MALICIOUS

PDF

38.6 KB Created: 2021-05-21 00:39:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2ef20a22a9638b383cbf0f6a907aa668 SHA-1: bd7f2d6e474210ee313599eebc8ad9e1f1424f83 SHA-256: cd0512102142f399096140bcb63f1d5a7b9fbc2d748d90b1e7b5abf176a8988c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to known malicious redirector infrastructure. The document body and embedded links suggest a lure for game-related cheats or generators, a common tactic for phishing or malware distribution. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/how-to-get-free-hair-on-roblox-2021-game-hack In PDF document text
    • http://www.reikiusui.it/images/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • http://www.reikiusui.it/images/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://www.reikiusui.it/images/free-spins-coin-master-2021_GM406889139.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_off00003613.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3613 26936 bytes
SHA-256: 13d5f69677bfce0c2986ebd1a3e696e4b8858ea3149e8267d619303410d21ecf
font_01_sfnt_off0000739e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739E 18968 bytes
SHA-256: 455f9f757065c9d134854ae3a28681843daa7c296a8d9a099cd1295f43c3d2ed

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