Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f973d6bf80e874b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 10:07:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6493e78f504d7a82ec3161d541587583 SHA-1: 6b99f50784edefa9a5eb5dda49ac32fb26ba2ae8 SHA-256: 8f973d6bf80e874bfd9ce03fe17ed66eeb4add84351606febdba187f47d5630c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a known malicious redirector, disguised as a game hack generator. The document body and heuristics indicate a lure for game-related cheats, which is a common social engineering tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to potentially harmful content.

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/roblox-bird-simulator-hack-script-game-hack In PDF document text
    • http://perpus.polbitrada.ac.id/repository/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-glitch-hack-download-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-cheat-thumbnail_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-free-robux-2021-pc_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-account-free-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-lumber-tycoon-2-money-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-fire-vs-pubg-tik-tok_GM835599320.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-sword-simulator-power-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-use-cheat-engine-67-on-roblox-booga-booga_GM431946152.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_off00002f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F49 22604 bytes
SHA-256: f25acdea0d3437bb50d51eb7261d879f81e94c3dc22880c9ba0110806e80afd7
font_01_sfnt_off000061a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A1 19632 bytes
SHA-256: 3efb8bcdc304cbfcd48b9037ae4fc7c3d7a4f26822d3b4dece82f1cb98e28db4

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