Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4802ee238fd08df…

MALICIOUS

PDF

34.0 KB Created: 2021-06-27 13:25:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6f43378db94415eb7771c280ca8326b7 SHA-1: d4d1392e8b56c3972fda3eb1f0fc71654574c2da SHA-256: a4802ee238fd08df1665f2ce17dec93f58af383af380feeec797a812c8ac05fc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes free in-game currency and hacks for games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users searching for cheats. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the document's structure and content strongly suggest it is designed to lead users to potentially malicious websites for phishing or malware distribution.

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/can-we-get-free-robux-in-roblox-game-hack PDF link annotation
    • http://perpus.polimarim.online/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-no-survey-or-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-ninja-shirt-free_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-dragon-ball-rage-all-gamepasses-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/website-roblox-cheat-new_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/kristjonz-15k-robux-reward-hack-tutorial_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-play-piano-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/is-hacking-roblox-legal_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-roblox-codes-2021-september_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/animations-gui-script-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-hackeado_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/guess-that-song-game-roblox-cheats_GM431946152.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_off00002e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7E 22108 bytes
SHA-256: 27dd4da831cfe4d6e8c39be4028aa13417fbcba9953b514ed86ca1a2b405c79d
font_01_sfnt_off00005f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F75 19092 bytes
SHA-256: 4f330cd2d409421b8ad96c0caf5a08ccf31e411d76c021b0b2730f4b3af882c3

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