Malicious PDF — malware analysis report

Static analysis result for SHA-256 acfd6f6396da6bd4…

MALICIOUS

PDF

34.1 KB Created: 2021-06-29 11:02:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 512e9e9388bb51e2363a87914e4ce190 SHA-1: 099fcabe89af0d59c8dad8494721f8da065f5276 SHA-256: acfd6f6396da6bd4f025e9bf826a26b17745190bb5b4c338cd2ddd78468d61fd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free generators'. The document body and extracted URLs strongly suggest a lure for users seeking cheats or in-game currency, which is a common social engineering tactic. The ML classifier also flagged this PDF with high confidence, indicating malicious characteristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/how-hack-to-get-robux-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-game_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-robloxes-visits_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/are-there-fe-free-games-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-prison-life-hack-script-mobile_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/20219-walk-speed-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-a-account-on-roblox-2021-no-logo_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-stuff-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/cheat-engine-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-5-ways_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/comment-hacker-un-jeu-de-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-link-daily-get-free-spins-amp_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
font_00_sfnt_off00002d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D66 22736 bytes
SHA-256: 406282d3f8240ab84cc6d7a896f0a9abd7740bd65838a5be8585c23b3a970409
font_01_sfnt_off00006041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6041 18992 bytes
SHA-256: 3507896ec0b95b2a99103e304fb2ed8edb8828aac05f62852c3848acf876956d

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