Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a32affb26ae607a…

MALICIOUS

PDF

35.5 KB Created: 2021-07-06 12:52:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 145587e12eff88ef1653310091341680 SHA-1: 005fa296ac5a2a485007add6851ca1ca8bb0f38d SHA-256: 8a32affb26ae607a46572c89d7f06e7204a1c1011862ba2d9ec1eb4068b4ca96
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, many of which are related to free in-game currency or hacks for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the 'ML_NYX_PDF_MALICIOUS' score is very high. The document body also contains a primary URL pointing to a 'free-coin-and-spin' hack, suggesting a scam or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/free-coin-and-spin-in-coin-master-game-hack
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-instantly_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/roblox-and-fortnite-bee-swarm-sim-free-eggs_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-minecraft-alts_GM479516143.pdf
    • http://digilib.ulm.ac.id/pusat/repository/coinmasterfree_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-to-get-free-spins_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/lastrick-com-coin-master-hack_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/roblox-item-giver-hack_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/roblox-sexually_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/fb-coin-master-free-spins-link_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-without-human-verification_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/como-se-hacker-en-roblox-2021_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-account-generatorold-account-spiiltz-rico_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/complete-offers-for-robux_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-tiktok-followers-no-human-verification_GM835599320.pdf
    • http://digilib.ulm.ac.id/pusat/repository/cheats-codes-roblox-treasure-hunt-simulator_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-coins-coin-master-iphone_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hack-ga_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/roblox-intriga-free_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/robux-hack-2021-no-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003488.bin
ed2bbdbfd606b2abf4ffce76b10b746716610ce34a3b85419bd54a2fddb1dd75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3488 22904 bytes
font_01_sfnt_off000067f1.bin
6eeec23f3dc1a8fda715f091be12cf507421137203139fa633fe014a904a42c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F1 18348 bytes

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