Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33b33e9330cabd3…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 11:06:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7a08a0d975d076025bf3cb44029ebaf1 SHA-1: 82a8df26ae7fb86ca40afbfe4be38ad3b24104dc SHA-256: c33b33e9330cabd3d62b69411d84464c891f8568dcfac3ce5641aacc2ec2ca28
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body referencing game cheats and free in-game currency, indicating a lure for users to visit potentially malicious sites. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of outbound links, and the 'ML_NYX_PDF_MALICIOUS' model strongly flags this PDF. While no scripts were explicitly extracted, the presence of embedded URLs and the document's content strongly suggest a phishing or malware distribution 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/how-to-get-free-coins-in-mcpe-master-game-hack
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/websites-to-get-free-robux_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-drop-master-free_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-hack-ios-2021_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/roblox-body-free_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/vehicle-simulator-roblox-money-hack_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-hack-2021-apk-download_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-cheat-on-roblox-guess-character_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/minecraft-java-edition-key-free_GM479516143.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/lazy-blocks-com-free-robux_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-get-free-robux-not-fake_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-spins_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-free-spins-for-iphone_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/roblox-superhero-city-hack_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/roblox-hacker-john-20-000-robux-gems-jarvascript-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032f6.bin
69f827f4a0e86532b170b08e4d2219e08ecf46598dd0a43828130537fbcd9f1b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32F6 23000 bytes
font_01_sfnt_off000066cb.bin
429c8df05e4b8cc7b4d833e2e7b4429a19a92e68eadf29af331a617609675059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CB 18336 bytes

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