Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b649cd822946b2…

MALICIOUS

PDF

36.6 KB Created: 2021-05-21 10:43:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c8bbd100596bc25b55c3737a9920c7cc SHA-1: 7dd8ab4285ecff56e58b961472f1b0b2f91a2326 SHA-256: 64b649cd822946b249fda7fc93d5b92d1f0edb04dee06be715565ffb31a93642
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links disguised as download opportunities for game-related cheats, with a primary link pointing to a known malicious redirector. The document body and heuristics indicate a lure for free items or game hacks, which is a common social engineering tactic. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/all-free-items-in-roblox-game-hack In PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-can-i-get-free-spins-on-coin-master_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_off00003405.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3405 25592 bytes
SHA-256: 8d880273113430fcb64b50783ebefbfedb0e5e098782457b68bb601bcb080f89
font_01_sfnt_off00006dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD4 18312 bytes
SHA-256: 33fa575e942d7ba38a015ae8cede41efd0632bb8ddda7beecb8e53db64cd625f

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