Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ac5dd0edba13bb…

MALICIOUS

PDF

46.0 KB Created: 2021-05-18 01:33:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ed2ebda881cf751337fef68ce5ffb226 SHA-1: e5d7a778af6ebabcd1f8bb5ef807f47816cd3f75 SHA-256: 73ac5dd0edba13bb6cdeb184aa4d8225fd20392525df9d6854a56144b917031d
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 PDF links, suggesting a link farm or content aggregation tactic. The document body and extracted URLs promote 'hacks' and 'free spins' for games, indicating a lure for users to download potentially malicious files or visit compromised sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/479516143/minecraft-diamond-finder-hack-game-hack
    • http://biljartenbarendrecht.nl/images/coin-master-free-spins-link-facebook-page_GM406889139.pdf
    • http://biljartenbarendrecht.nl/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • http://biljartenbarendrecht.nl/images/apps-to-get-free-robux_GM431946152.pdf
    • http://biljartenbarendrecht.nl/images/coin-master-heaven-links-free-spins_GM406889139.pdf
    • http://biljartenbarendrecht.nl/images/how-to-hack-a-minecraft-server_GM479516143.pdf
    • http://biljartenbarendrecht.nl/images/roblox-zone-free-robux_GM431946152.pdf
    • http://biljartenbarendrecht.nl/images/free-robux-that-actually-works_GM431946152.pdf
    • http://biljartenbarendrecht.nl/images/free-coin-master-spins-2021_GM406889139.pdf
    • http://biljartenbarendrecht.nl/images/coin-master-apk-hack_GM406889139.pdf
    • http://biljartenbarendrecht.nl/images/minecraft-coins-free_GM479516143.pdf
    • http://biljartenbarendrecht.nl/images/minecraft-windows-10-edition-hacked-client_GM479516143.pdf
    • http://biljartenbarendrecht.nl/images/coin-master-hack-version-2021-free-download_GM406889139.pdf
    • http://biljartenbarendrecht.nl/images/free-robux-group_GM431946152.pdf
    • http://biljartenbarendrecht.nl/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://biljartenbarendrecht.nl/images/coin-master-hack-cheat-engine_GM406889139.pdf
    • http://biljartenbarendrecht.nl/images/chisel-and-bits-mod-minecraft-pe_GM479516143.pdf
    • http://biljartenbarendrecht.nl/images/freerubux_GM431946152.pdf
    • http://biljartenbarendrecht.nl/images/free-headless-head-roblox_GM431946152.pdf
    • http://biljartenbarendrecht.nl/images/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://biljartenbarendrecht.nl/images/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d15.bin
be2dd6463439d32513722f673bc370224d8817f60194b2c96200c1c52eb6fcb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D15 25476 bytes
font_01_sfnt_off000086ce.bin
eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
pdf-font-stream PDF embedded font (sfnt) at offset 0x86CE 2940 bytes
font_02_sfnt_off000090de.bin
265962787b73e694aac7c67ed987488fc8d8021a4c66c1127c37ccae154b779c
pdf-font-stream PDF embedded font (sfnt) at offset 0x90DE 18484 bytes