Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7bbd1c4aa0feed9…

MALICIOUS

PDF

41.7 KB Created: 2021-05-11 07:20:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0bf2c9d1ecb2717c9187cbf04e624044 SHA-1: 8fe7e80146ad119e946306f0c5ba5135ddba26c7 SHA-256: b7bbd1c4aa0feed9b7c9f84f1ea2922c817391a31641fe3efe6fac278a7647a5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are related to game hacks and free in-game currency, suggesting a lure for users to visit potentially malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports this assessment. The document body contains text and URLs that reinforce the theme of exploiting games, likely to direct users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/hack-the-game-coin-master-game-hack
    • http://arkivthy.dk/images/roblox-no-download-hack_GM431946152.pdf
    • http://arkivthy.dk/images/easy-ways-to-get-free-robux_GM431946152.pdf
    • http://arkivthy.dk/images/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • http://arkivthy.dk/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://arkivthy.dk/images/coin-master-free-spins-link-download-hack_GM406889139.pdf
    • http://arkivthy.dk/images/coin-master-free-chip_GM406889139.pdf
    • http://arkivthy.dk/images/free-coin-master-coins_GM406889139.pdf
    • http://arkivthy.dk/images/300-daily-free-spins-coin-master_GM406889139.pdf
    • http://arkivthy.dk/images/get-free-robux-info_GM431946152.pdf
    • http://arkivthy.dk/images/coin-master-free-fire_GM406889139.pdf
    • http://arkivthy.dk/images/coin-master-jackpot-madness-hack_GM406889139.pdf
    • http://arkivthy.dk/images/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://arkivthy.dk/images/how-to-hack-coin-master-spin_GM406889139.pdf
    • http://arkivthy.dk/images/coin-master-hack-app-link_GM406889139.pdf
    • http://arkivthy.dk/images/mcpe-free-download_GM479516143.pdf
    • http://arkivthy.dk/images/can-you-really-hack-coin-master-ios_GM406889139.pdf
    • http://arkivthy.dk/images/coin-master-cheats-free-spins_GM406889139.pdf
    • http://arkivthy.dk/images/coin-master-hack-fast-org_GM406889139.pdf
    • http://arkivthy.dk/images/coin-master-free-spins-link-today-facebook_GM406889139.pdf
    • http://arkivthy.dk/images/twitter-coin-master-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a81.bin
43c4c3a638ee5b4033bde26b7cca10fa52d2569a780de61e6f145bd4be5523a1
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A81 24432 bytes
font_01_sfnt_off00008108.bin
2f83051d17fae7824be312dca8a0683f54a2c939f925aee2db8065487592d47a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8108 18144 bytes