Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46b2b66376d14ba…

MALICIOUS

PDF

43.5 KB Created: 2021-05-14 18:59:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 56ed8e89ffc813f57b4292d27ff22988 SHA-1: 2d281d065ca3b301baf71fcfadad7512f5f38742 SHA-256: d46b2b66376d14ba3d71c2d1bb0e7e493b008213d52f80a2ac6f758eca72251e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It contains a large number of external links, many of which point to other PDF files hosted on similar domains, suggesting a link farm or SEO manipulation tactic. The document body and embedded links promote topics like 'Coin Master' and 'Minecraft' hacks, indicating a lure for potentially unwanted or malicious content. While no scripts were explicitly extracted, the PDF structure itself facilitates the embedding of URIs, which are leveraged here to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/free-coin-master-spin-and-coin-link-game-hack
    • http://ikig.ru/images/coin-master-game-hacking_GM406889139.pdf
    • http://ikig.ru/images/free-spins-for-coin-master_GM406889139.pdf
    • http://ikig.ru/images/coin-master-unlimited-spin-hack_GM406889139.pdf
    • http://ikig.ru/images/is-minecraft-free_GM479516143.pdf
    • http://ikig.ru/images/minecraft-maps-pe-free-download_GM479516143.pdf
    • http://ikig.ru/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdf
    • http://ikig.ru/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdf
    • http://ikig.ru/images/easy-way-to-get-robux_GM431946152.pdf
    • http://ikig.ru/images/minecraft-java-free-account_GM479516143.pdf
    • http://ikig.ru/images/i-cant-get-free-spins-coin-master_GM406889139.pdf
    • http://ikig.ru/images/roblox-images_GM431946152.pdf
    • http://ikig.ru/images/free-robux-com_GM431946152.pdf
    • http://ikig.ru/images/facebook-coin-master-free-spins_GM406889139.pdf
    • http://ikig.ru/images/coin-master-free_GM406889139.pdf
    • http://ikig.ru/images/coin-master-free-link_GM406889139.pdf
    • http://ikig.ru/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://ikig.ru/images/coin-master-heaven-free-spins_GM406889139.pdf
    • http://ikig.ru/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • http://ikig.ru/images/robuxy-com-free-robux_GM431946152.pdf
    • http://ikig.ru/images/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047ef.bin
7f368125cfb48f34fa413178cf10d09fe373c2f82dccad32bf76d48383c05ea1
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47EF 23732 bytes
font_01_sfnt_off00007dbb.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBB 2880 bytes
font_02_sfnt_off000087a5.bin
033fb27de386422edfdfffc04f89508c7363de2f22c7244a0850c98a16a8d6aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x87A5 18228 bytes