Malicious PDF — malware analysis report

Static analysis result for SHA-256 934b96b73fd22136…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 10:47:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 41ad93a984b6bd25444c06cfcaaeb5a2 SHA-1: b7aa2b31898bfd991bfb555992abdacb200ee113 SHA-256: 934b96b73fd22136ff70e0df45bcc0dc9be14384122210968966a9bfb6036013
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a prominent call-to-action related to "hacks" for popular games like Coin Master and Roblox. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm designed to attract users with deceptive content. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file. While no scripts were explicitly extracted, the structure and embedded links strongly suggest a phishing or malware distribution attempt.

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/hack-to-get-free-spins-on-coin-master-game-hack
    • http://arhi-z.ru/images/safe-hack-for-coin-master-android_GM406889139.pdf
    • http://arhi-z.ru/images/how-to-hack-roblox-jailbreak_GM431946152.pdf
    • http://arhi-z.ru/images/free-robux-no-apps_GM431946152.pdf
    • http://arhi-z.ru/images/free-robux-site_GM431946152.pdf
    • http://arhi-z.ru/images/free-coins-coin-master-ios_GM406889139.pdf
    • http://arhi-z.ru/images/roblox-gift-card-online-free_GM431946152.pdf
    • http://arhi-z.ru/images/how-to-get-free-robux-no-survey_GM431946152.pdf
    • http://arhi-z.ru/images/free-spin-link-coin-master-today_GM406889139.pdf
    • http://arhi-z.ru/images/master-coin-free-spin_GM406889139.pdf
    • http://arhi-z.ru/images/rbx-place-free-robux_GM431946152.pdf
    • http://arhi-z.ru/images/hack-coin-master-spin-android_GM406889139.pdf
    • http://arhi-z.ru/images/robux-come_GM431946152.pdf
    • http://arhi-z.ru/images/blogspot-coin-master-free-spins_GM406889139.pdf
    • http://arhi-z.ru/images/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • http://arhi-z.ru/images/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://arhi-z.ru/images/is-free-robux-real_GM431946152.pdf
    • http://arhi-z.ru/images/coin-master-free-spins-hack-download_GM406889139.pdf
    • http://arhi-z.ru/images/free-robux-rewards_GM431946152.pdf
    • http://arhi-z.ru/images/daily-free-spins-on-coin-master_GM406889139.pdf
    • http://arhi-z.ru/images/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ab.bin
5879318d2735b65d12e443d6ff88c5ea03409662000d3650a39bfe16f5deffeb
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49AB 25692 bytes
font_01_sfnt_off000083d8.bin
2fbb404e8dbae95b2969f6d33f181e6a84e8673995acec3e52dde22e48280f02
pdf-font-stream PDF embedded font (sfnt) at offset 0x83D8 18056 bytes