Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3611ea89c52178…

MALICIOUS

PDF

33.7 KB Created: 2021-06-18 12:00:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a6fd2f42cb17623f97b1aca4c628b07f SHA-1: 7ee5b0d9b816fb9c09edd05a1bc46266d82dfc11 SHA-256: 8f3611ea89c52178a2124bc9d5a6971e3f3b411bf54c3dce5b000094341277d8
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are presented as download pages for game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to direct users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

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.co/app/431946152/v3rmillion-roblox-fly-hack-game-hack PDF link annotation
    • http://aviaprofsoyuz.info/images/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/black-clover-online-roblox-hack_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-free-cool-t-shirts_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-laptop_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-robux-for-free-2021-on-phone_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-small-amount-of-robux-fre_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/white-t-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/make-free-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/daily-free-spins-coin-master-2021_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
font_00_sfnt_off00002dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC6 21704 bytes
SHA-256: 67b496a757ee249c985d85a1875bae618acbcf9b3bfc33b0ff700665051b2ffa
font_01_sfnt_off00005d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8A 19500 bytes
SHA-256: f4a8b90db12cf8d4b6433bda62432a7cdb4e1e332490bc6348013d9a2ea24225

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