Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f70ccbe91e2cb6…

MALICIOUS

PDF

44.9 KB Created: 2021-05-10 17:45:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 166b3d0f44baf2e2ca7d6428e9f7ee69 SHA-1: 617d6b28cf024ea6e1e4027a261f5250bf0a1811 SHA-256: 44f70ccbe91e2cb6e71ae3711083c042ea3f716ef8c171becc777b619859838e
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a fake CAPTCHA and a prominent download link, indicating a social engineering attempt to trick the user into downloading a file. The document also contains a large number of external links, many of which point to other PDF documents, suggesting a link farm or SEO poisoning tactic. The primary URL points to a file named 'hack-coin-master-apk-3.2-download-game-hack', further supporting the lure of a potentially malicious application download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/406889139/hack-coin-master-apk-3.2-download-game-hack
    • http://lib.stiesultanagung.ac.id//repository/blox-fish-free-robux_GM431946152.pdf
    • http://lib.stiesultanagung.ac.id//repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdf
    • http://lib.stiesultanagung.ac.id/repository/minecraft-java-for-free_GM479516143.pdf
    • http://lib.stiesultanagung.ac.id//repository/how-to-get-free-faces-on-roblox_GM431946152.pdf
    • http://lib.stiesultanagung.ac.id/repository/coin-master-free-cards-link-2021-today_GM406889139.pdf
    • http://lib.stiesultanagung.ac.id//repository/roblox-arsenal-hacks-download_GM431946152.pdf
    • http://lib.stiesultanagung.ac.id/repository/free-minecraft-bedrock-server-hosting_GM479516143.pdf
    • http://lib.stiesultanagung.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • http://lib.stiesultanagung.ac.id//repository/coin-master-free-account_GM406889139.pdf
    • http://lib.stiesultanagung.ac.id/repository/coin-master-hack-no-root_GM406889139.pdf
    • http://lib.stiesultanagung.ac.id//repository/minecraft-java-edition-free-download_GM479516143.pdf
    • http://lib.stiesultanagung.ac.id/repository/coin-master-free-daily-spins-today_GM406889139.pdf
    • http://lib.stiesultanagung.ac.id//repository/do-coin-master-hacks-work_GM406889139.pdf
    • http://lib.stiesultanagung.ac.id/repository/robux-free-online_GM431946152.pdf
    • http://lib.stiesultanagung.ac.id//repository/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • http://lib.stiesultanagung.ac.id/repository/coin-master-game-android-free-download_GM406889139.pdf
    • http://lib.stiesultanagung.ac.id/repository/free-roblox-hack_GM431946152.pdf
    • http://lib.stiesultanagung.ac.id//repository/coin-master-hack-apk-no-survey_GM406889139.pdf
    • http://lib.stiesultanagung.ac.id//repository/coin-master-free-spins-link-download_GM406889139.pdf
    • http://lib.stiesultanagung.ac.id//repository/roblox-promo-codes-2021-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aa1.bin
667d2467e0725645ae6e574529e1eebb5cd95c0836e6c65247a2204153898874		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA1 24304 bytes
font_01_sfnt_off00008187.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8187 2840 bytes
font_02_sfnt_off00008b38.bin
d746a7c1c5cf5be311eddf8676cfb9402845d24e0d8fc8e00b27a1d9de62f851		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B38 18836 bytes

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