Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6447f3c4d9a823…

MALICIOUS

PDF

44.1 KB Created: 2021-06-09 06:58:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3809bf7f2588722d36cd3c342b4962c9 SHA-1: 9e9f14a61155366e57bbc6ea1aa6fe905c039a11 SHA-256: ca6447f3c4d9a8238c7dd7c9c600f47f9da25486bfa7e3b972f4fb4a73842b10
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. The ML classifier also flagged the PDF with high confidence. The embedded URL and the document body text both indicate a lure for a 'Roblox Hacking Game Hack' generator, which is a common social engineering tactic to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/yammy-roblox-hacking-game-hack In PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/cm-free-spins_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_004_off0000513b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x513B 23720 bytes
SHA-256: 5de900c7ad2eab7c224a15f8f9d88396913333fa09ea43dbb41ab9cf221c2da4
font_01_sfnt_off0000870c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870C 19192 bytes
SHA-256: 4eb81fdcb87a1f120c655ff4619edcc117ce205e964873a23c1fe0ea0c9924a2

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