Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c58e09d5ebc667…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 11:09:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6a134b28f62ed6e620d304b137aa704a SHA-1: a4a7cea942a85b776e39fe2158b5b0f2b1e826e2 SHA-256: d8c58e09d5ebc667516a0d28482c861d90f88f60d5cec95c793e9e5a6b8d7576
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many of which point to IP addresses and are designed to appear as legitimate download pages for game cheats and free currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of such links, suggesting a phishing or malware distribution scheme. The presence of a download button lure further supports this, aiming to trick users into clicking through to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.tw/app/406889139/coin-master-free-coins-and-spins-game-hack
    • http://103.30.145.97/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/coin-master-claim-free-spins_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/coin-master-free-spins-hack-download_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/how-can-u-get-free-robux_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/how-to-get-20210-robux-for-free_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/roblox-robux-hack-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/coin-master-daily-free-spins-link_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/minecraft-ps3-free-download_GM479516143.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/lazyblox-com-free-robux_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/minecraft-xbox-free_GM479516143.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/instagram-free-coin-master-spins_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/gamesofficenet-hack-coin-master_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/easy-and-fast-quickest-way-to-get-free-robux_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/robux-generators-that-actually-work_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/coin-master-rewards-2021_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/roblox-dinosaur-simulator-how-to-get-megavore-for-free-2021_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/spin-links-for-coin-master_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/roblox-group-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003244.bin
0634b97386ebf4418dfc42c34b4fb65ed95f2b044f291950fa2dc0ca28a4dc6d
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3244 23080 bytes
font_01_sfnt_off0000663b.bin
8f4e14d352258b2a04c4750a5c5e6ee18e44525ef82eed3820f54d352c64eef8
pdf-font-stream PDF embedded font (sfnt) at offset 0x663B 18348 bytes