Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae743526a186bac8…

MALICIOUS

PDF

43.5 KB Created: 2021-05-17 07:37:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 72fa20e8d92bb16feaf8a0b182478519 SHA-1: aced92acc246a080eeb1ba7aaf3c17ba9594238a SHA-256: ae743526a186bac820b9faa690ac8839aaf97bf1982bc27adb679fb2b5510af5
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF gateways for game hacks and cheats. The presence of a PDF_URI heuristic firing and the ML_NYX_PDF_MALICIOUS model output strongly indicate malicious intent. The document's content and structure suggest a lure to download potentially unwanted or malicious software, masquerading as game-related downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/479516143/minecraft-java-free-download-game-hack
    • http://archi-z.ru/images/coin-master-hack-spin-160-pro_GM406889139.pdf
    • http://archi-z.ru/images/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdf
    • http://archi-z.ru/images/como-generar-coin-master-free-spins_GM406889139.pdf
    • http://archi-z.ru/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • http://archi-z.ru/images/coin-master-haktuts_GM406889139.pdf
    • http://archi-z.ru/images/free-draw-2-roblox_GM431946152.pdf
    • http://archi-z.ru/images/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • http://archi-z.ru/images/coin-master-game-free-download_GM406889139.pdf
    • http://archi-z.ru/images/minecraft-hacked-apk_GM479516143.pdf
    • http://archi-z.ru/images/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://archi-z.ru/images/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://archi-z.ru/images/free-spins-coin-master_GM406889139.pdf
    • http://archi-z.ru/images/how-to-get-free-minecraft-alts_GM479516143.pdf
    • http://archi-z.ru/images/coin-master-free-daily-spins-link-2021_GM406889139.pdf
    • http://archi-z.ru/images/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdf
    • http://archi-z.ru/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://archi-z.ru/images/coin-master-free-spins-link-today-instagram_GM406889139.pdf
    • http://archi-z.ru/images/coin-master-tricks_GM406889139.pdf
    • http://archi-z.ru/images/roblox-rewards_GM431946152.pdf
    • http://archi-z.ru/images/master-coin-free-link_GM406889139.pdf
    • https://playhack.in/minecraft
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048c8.bin
23bdb03cfb3c12534946e11b51d1ddba703825ebf3193ce30811fe5470037764
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C8 27524 bytes
font_01_sfnt_off00008715.bin
84d994c9ca9b5ef406cb0cbd16402c282b50396e13120ada9f75f5d4c4d42292
pdf-font-stream PDF embedded font (sfnt) at offset 0x8715 18572 bytes