Malicious PDF — malware analysis report

Static analysis result for SHA-256 22194e312ae3631a…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 16:13:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a5ed371bd9dbcbf3f62e3d88e0e7b975 SHA-1: 4258a3e4cb8469dc1b8511ba94125c826aee6f4d SHA-256: 22194e312ae3631a577e2e9796d61411eb4070abd3518ed21dc4bf5ad80e164f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to malicious infrastructure. The document body and heuristics indicate a lure for game hacks or generators, suggesting a phishing or scam attempt. The primary malicious URL identified is http://netcdn.tw/app/479516143/how-to-get-minecraft-for-free-on-computer-game-hack, which is flagged as a redirector. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a malicious lure.

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/479516143/how-to-get-minecraft-for-free-on-computer-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/reddit-someone-hacked-my-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/case-clicker-case-hack-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/ben-10-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-on-roblox-2021-without-waiting_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-cheat-without-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/descargar-roblox-hackeado-robux-infinitos_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-aimbot-hack-download_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/ariana-grande-break-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coins-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-with-consol_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/rbx-earn_GM431946152.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_off00003499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3499 22496 bytes
SHA-256: 3a70f9eaf5c1e88ccd533b6e4fc0f3f7621317e3b2f598083211f12313d5965e
font_01_sfnt_off0000669d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669D 18736 bytes
SHA-256: 17f0bfc7da489febe2cf31a01e732b59c776963868fc2712bfb7438877b5a354

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