Malicious PDF — malware analysis report

Static analysis result for SHA-256 32fdf94adf49e717…

MALICIOUS

PDF

40.7 KB Created: 2021-05-15 03:11:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c38a2e75cc3f45c9266af064cc9a547f SHA-1: 3054bb5b040037d70b9a507924258cdb6b88eecb SHA-256: 32fdf94adf49e717fb8ba60b06bd2c5c40f5f66b03f0e30f0a1ffc16808b2047
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that form a link farm, primarily directing users to sites offering "free spins" and "hacks" for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a deceptive SEO tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the content strongly suggest a phishing or malware distribution attempt, likely using a spearphishing attachment as the initial access vector.

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/spin-coin-master-free-game-hack PDF link annotation
    • http://maslabaou.com/images/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://maslabaou.com/images/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://maslabaou.com/images/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://maslabaou.com/images/wurst-115_GM479516143.pdfIn PDF document text
    • http://maslabaou.com/images/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000045f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45F8 24336 bytes
SHA-256: c2ff9620cfbcbcdd93de371e9e3cd1a3f11c6668b49a90d69a06718a72e3f7b0
font_01_sfnt_off00007db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB7 17884 bytes
SHA-256: 6361ede382a163d704ed6c8f102c2990305f9cba1a2540397fd15e2a8f655622

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