Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d043ae3b6c2d62…

MALICIOUS

PDF

41.8 KB Created: 2021-05-11 16:13:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2e0c454220f74b7c2499a8f169f8709f SHA-1: 79d08b9f1b24f590ced452c461fb1a4de7001aeb SHA-256: c5d043ae3b6c2d62520be236fc6b900915fd50e8c49abe836f321ea028f634a4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO spam tactic. The document body and extracted URLs suggest a lure related to free coins, spins, or hacks for games like Coin Master and Roblox. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to drive traffic to malicious sites or distribute further payloads.

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/free-coin-spin-daily-link-coin-master-game-hack
    • http://aimp-market.ru/images/how-to-hack-and-get-free-robux_GM431946152.pdf
    • http://aimp-market.ru/images/haktuts-coin-master-free-spins-2021_GM406889139.pdf
    • http://aimp-market.ru/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • http://aimp-market.ru/images/free-daily-spins-coin-master-2021_GM406889139.pdf
    • http://aimp-market.ru/images/roblox-hacks-com_GM431946152.pdf
    • http://aimp-market.ru/images/roblox-free-robux-no-verification_GM431946152.pdf
    • http://aimp-market.ru/images/rbx-hut-promo-codes_GM431946152.pdf
    • http://aimp-market.ru/images/roblox-royale-high-diamond-hack_GM431946152.pdf
    • http://aimp-market.ru/images/free-robux-place_GM431946152.pdf
    • http://aimp-market.ru/images/how-to-get-free-robux-with-no-verification_GM431946152.pdf
    • http://aimp-market.ru/images/coin-master-free-spin-reward-links_GM406889139.pdf
    • http://aimp-market.ru/images/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://aimp-market.ru/images/free-spins-coin-master-links_GM406889139.pdf
    • http://aimp-market.ru/images/minecraft-bedrock-for-free_GM479516143.pdf
    • http://aimp-market.ru/images/how-to-hack-roblox-games_GM431946152.pdf
    • http://aimp-market.ru/images/minecraft-mod-menu_GM479516143.pdf
    • http://aimp-market.ru/images/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • http://aimp-market.ru/images/2021-no-human-verification-hack-for-coin-master_GM406889139.pdf
    • http://aimp-market.ru/images/get-me-robux-for-free_GM431946152.pdf
    • http://aimp-market.ru/images/hack-to-protect-village-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a05.bin
b401e45fb011fb30376d3763b20fccf76c03fafc5cfdc636a91693188b2d8db0
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A05 23820 bytes
font_01_sfnt_off0000804a.bin
9d60a2e782eeb8051ddff45576a6e1a66ba7dfa86d66828505d8c060f58b239a
pdf-font-stream PDF embedded font (sfnt) at offset 0x804A 18476 bytes