Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfab18900e687355…

MALICIOUS

PDF

41.6 KB Created: 2021-05-14 20:05:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ca4736e53da087c77624094042220b61 SHA-1: 8dabfbbd456630e3fabbaac006ef6cc69abfdabd SHA-256: dfab18900e68735593b66d6844b68b9ecf8ea6272443ec054cfb894e0368d6c9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to external sites, many of which appear to be part of a link farm designed for SEO manipulation. The ML classifier strongly indicated maliciousness, and the presence of external URIs and a link farm heuristic suggests a campaign to drive traffic to potentially malicious or scam-related content. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious document.

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/coin-master-free-spin-ml-game-hack
    • http://amtabor2.at/images/coin-master-ultra-attack-hack_GM406889139.pdf
    • http://amtabor2.at/images/free-spin-links-coin-master-october-30-2021_GM406889139.pdf
    • http://amtabor2.at/images/free-robux-games_GM431946152.pdf
    • http://amtabor2.at/images/coin-master-free-spins-link-download-hack_GM406889139.pdf
    • http://amtabor2.at/images/roblox-login-hack_GM431946152.pdf
    • http://amtabor2.at/images/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://amtabor2.at/images/coin-master-free-spins-app_GM406889139.pdf
    • http://amtabor2.at/images/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • http://amtabor2.at/images/how-to-hack-golden-card-in-coin-master_GM406889139.pdf
    • http://amtabor2.at/images/free-spins-coin-master-site-wwwquoracom_GM406889139.pdf
    • http://amtabor2.at/images/coin-master-tool-hack_GM406889139.pdf
    • http://amtabor2.at/images/coin-master-hack-ios-2021_GM406889139.pdf
    • http://amtabor2.at/images/daily-coin-master-free-spin-link_GM406889139.pdf
    • http://amtabor2.at/images/free-old-roblox-accounts_GM431946152.pdf
    • http://amtabor2.at/images/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • http://amtabor2.at/images/2021-free-spins-coin-master-link_GM406889139.pdf
    • http://amtabor2.at/images/coin-master-hacker-club_GM406889139.pdf
    • http://amtabor2.at/images/how-to-get-free-robux-on-iphone_GM431946152.pdf
    • http://amtabor2.at/images/free-robux-only-username-no-human-verification_GM431946152.pdf
    • http://amtabor2.at/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004873.bin
081eeca2bcbde9d9fd0f9bdba3d8a22d49535b966ebaf23916f88e21c402242c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4873 24840 bytes
font_01_sfnt_off00008120.bin
444b71fec9169bc90a734dd5dd223b39b45661ce510f738c863c1de9395466a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8120 17960 bytes