Malicious PDF — malware analysis report

Static analysis result for SHA-256 840651cf4ab24596…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 01:10:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0c92740a0f4f41d0803f816b5a0ed01c SHA-1: c80240f5957bb97f1798c0abb96f6138d6385b21 SHA-256: 840651cf4ab24596e80c2ca20da2950cf7c22426ae940056234babbe561243b2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one pointing to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for game-related cheats or currency, likely leading to a phishing or malware download site. No scripts were extracted, but the presence of malicious links and the lure suggest a phishing or redirection attack.

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.tw/app/431946152/roblox-generator-com-game-hack In PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-hack-no-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robux-de-com-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-is-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-meep-city-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-hack-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D04 22728 bytes
SHA-256: 9df0de9b327c88830d3634c60a7706b16eba3cd345e74497f3d3e67a264685f3
font_01_sfnt_off0000600f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600F 18848 bytes
SHA-256: 0a4af514c889a3451c1d9ad9c5647b2e50cd91b862ec9300b3ebbff7a9306fbb

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