Malicious PDF — malware analysis report

Static analysis result for SHA-256 d81b1f7668c3d829…

MALICIOUS

PDF

46.6 KB Created: 2021-05-16 01:26:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dee2fa33955b7899b6112b3eb78ec22d SHA-1: 5d00aa8c2ea860e37432d4e05bd81cf68541c243 SHA-256: d81b1f7668c3d8290d561e9f8ffbc8d06994e2f8cd15f6357c4a5dd2ba6b46b7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDFs related to game cheats and free in-game items. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, and the ML classifier flagged the PDF as malicious. The presence of a call-to-action phrase further supports a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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 https://netcdn.xyz/app/406889139/coin-master-free-spins-link-whatsapp-group-game-hack PDF link annotation
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ced.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CED 25880 bytes
SHA-256: 1e2c41bc7870f34aa9f1aa33f27125d55c3f71caf5eea8f8e5d015aed2ce7df1
font_01_sfnt_off000087f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F3 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off0000931d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x931D 18560 bytes
SHA-256: e17242fb732615db3af82b15b0eb94d62c2cda97be0a738ea92ad14a310048ef

Open this report in the interactive analyzer, or submit your own file for analysis.