Malicious PDF — malware analysis report

Static analysis result for SHA-256 566827fabaa9d272…

MALICIOUS

PDF

42.9 KB Created: 2021-05-17 20:30:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 79be34078ff50d71900e7fc94dd6fec0 SHA-1: bdecea74b68c6955297dedf710b33e90c5cec06e SHA-256: 566827fabaa9d272da9f0c9ce766436caad24b93ab6b1146cf3ee30ec871ba93
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that lures users with promises of free Robux and Coin Master hacks. The ML classifier and PDF link farm heuristics strongly indicate malicious intent. The document likely serves as a lure to direct users to malicious websites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/how-to-earn-robux-game-hack
    • http://depelem.fr/images/coin-master-hack-spins-game-download_GM406889139.pdf
    • http://depelem.fr/images/how-do-i-get-free-robux_GM431946152.pdf
    • http://depelem.fr/images/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdf
    • http://depelem.fr/images/coin-master-free-spin-best-link_GM406889139.pdf
    • http://depelem.fr/images/hack-coin-master-32-mod-apk_GM406889139.pdf
    • http://depelem.fr/images/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://depelem.fr/images/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://depelem.fr/images/free-robux-only-username_GM431946152.pdf
    • http://depelem.fr/images/descargar-hack-coin-master_GM406889139.pdf
    • http://depelem.fr/images/how-to-hack-coin-master-without-root_GM406889139.pdf
    • http://depelem.fr/images/coin-master-free-spins-and-coins-today_GM406889139.pdf
    • http://depelem.fr/images/how-to-get-free-robux-on-android_GM431946152.pdf
    • http://depelem.fr/images/roblox-comroblox_GM431946152.pdf
    • http://depelem.fr/images/free-spins-coin-master-legit_GM406889139.pdf
    • http://depelem.fr/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://depelem.fr/images/websites-that-give-free-robux_GM431946152.pdf
    • http://depelem.fr/images/free-robux-no-download_GM431946152.pdf
    • http://depelem.fr/images/coin-master-free-spins-8-14-2021_GM406889139.pdf
    • http://depelem.fr/images/free-daily-coin-master-coins_GM406889139.pdf
    • http://depelem.fr/images/coin-master-blogspot_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000487a.bin
c8586d3e0908b34826854772298d2801dbdde583fdddffc549e0816af7a757ad
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487A 26520 bytes
font_01_sfnt_off00008569.bin
e59d0dbfa916da45dc1e57bbb1674eee7460563807a8b8eb6343b67328d59b2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8569 18244 bytes