Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff0c9239b2717b9…

MALICIOUS

PDF

41.2 KB Created: 2021-05-13 15:00:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 333c0293f9f80ede46e0c942e28e9269 SHA-1: ba3a9985fc732277c96433e6dbf40331c8f79af0 SHA-256: bff0c9239b2717b90e767b8968feeb5426434de518b043efad72ba39be32851c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to websites offering game cheats or hacks, suggesting a link farm or scam lure. The presence of an embedded URI and the ML classifier's high confidence score indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or social engineering attempt to direct users to malicious content.

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-spins-glitch-game-hack
    • http://osteonad.com/images/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdf
    • http://osteonad.com/images/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://osteonad.com/images/20-free-spin-link-coin-master_GM406889139.pdf
    • http://osteonad.com/images/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://osteonad.com/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • http://osteonad.com/images/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdf
    • http://osteonad.com/images/coin-master-hack-app_GM406889139.pdf
    • http://osteonad.com/images/robux-online_GM431946152.pdf
    • http://osteonad.com/images/free-robux-codes-2021_GM431946152.pdf
    • http://osteonad.com/images/get-2021-free-spins-on-coin-master_GM406889139.pdf
    • http://osteonad.com/images/how-to-get-free-skins-on-coin-master_GM406889139.pdf
    • http://osteonad.com/images/free-spins-coin-master-no-verification_GM406889139.pdf
    • http://osteonad.com/images/free-mod-apk-coin-master_GM406889139.pdf
    • http://osteonad.com/images/free-coin-master-spins-2021-link_GM406889139.pdf
    • http://osteonad.com/images/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://osteonad.com/images/spin-rewards-coin-master_GM406889139.pdf
    • http://osteonad.com/images/minecraft-java-code-free_GM479516143.pdf
    • http://osteonad.com/images/minecraft-pe-hacked-client-download_GM479516143.pdf
    • http://osteonad.com/images/free-robux-hacker-us_GM431946152.pdf
    • http://osteonad.com/images/coin-master-fb-free-spins-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046c6.bin
e4484f5aae56515e9c1716aa45d7724e8ce49c4dc11b96e3bad9cfc0106eb29a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46C6 24580 bytes
font_01_sfnt_off00007f13.bin
be2b3679075e4e1310ff978ad8c26e1b718646752b81212a75ede70c65753871
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F13 18124 bytes