Malicious PDF — malware analysis report

Static analysis result for SHA-256 08de81d5cc0c1236…

MALICIOUS

PDF

35.3 KB Created: 2021-06-26 03:03:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5d1a8f0375984281147fea5df8169d0f SHA-1: 534b0bdeff7b6f04ce3358375a73c4acb21a8b86 SHA-256: 08de81d5cc0c12363b507e70308904132e26febdcd3195acf702c7d0a38ca319
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that direct users to websites promising free Robux and Coin Master spins. The ML classifier strongly indicated maliciousness, and the presence of these links suggests a phishing or scamming attempt. The document body and heuristics indicate a lure for in-game currency or cheats, likely leading to credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-free-robux-by-inspekting-game-hack
    • http://perpustakaan-stikesmsb.com/repository/coin-master-free-spins-11-01-2021_GM406889139.pdf
    • http://perpustakaan-stikesmsb.com/repository/hacks-para-tener-aimbot-en-roblox_GM431946152.pdf
    • http://perpustakaan-stikesmsb.com/repository/roblox-fallen-hacks_GM431946152.pdf
    • http://perpustakaan-stikesmsb.com/repository/minecraft-building-hacks_GM479516143.pdf
    • http://perpustakaan-stikesmsb.com/repository/coin-master-apk-free-download_GM406889139.pdf
    • http://perpustakaan-stikesmsb.com/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • http://perpustakaan-stikesmsb.com/repository/addrbx-earn-free-robux-by-doing-tasks_GM431946152.pdf
    • http://perpustakaan-stikesmsb.com/repository/coin-master-hack-no-human-verification_GM406889139.pdf
    • http://perpustakaan-stikesmsb.com/repository/free-spins-coin-master-links-blogspot_GM406889139.pdf
    • http://perpustakaan-stikesmsb.com/repository/free-robux-no-human-vervication_GM431946152.pdf
    • http://perpustakaan-stikesmsb.com/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • http://perpustakaan-stikesmsb.com/repository/free-spin-link-coin-master-today_GM406889139.pdf
    • http://perpustakaan-stikesmsb.com/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdf
    • http://perpustakaan-stikesmsb.com/repository/hack-coin-master-no-survey_GM406889139.pdf
    • http://perpustakaan-stikesmsb.com/repository/free-robux-generator-no-survey-mac_GM431946152.pdf
    • http://perpustakaan-stikesmsb.com/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdf
    • http://perpustakaan-stikesmsb.com/repository/coin-master-hack-no-verify_GM406889139.pdf
    • http://perpustakaan-stikesmsb.com/repository/free-coins-coin-master-no-human-verification_GM406889139.pdf
    • http://perpustakaan-stikesmsb.com/repository/hacks-master-coin_GM406889139.pdf
    • http://perpustakaan-stikesmsb.com/repository/robux-hack-free-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003234.bin
9b96ca2855c9883c27593d82c7b7fbad78cb642bb0a9f3a878d98547f6f6989f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3234 22036 bytes
font_01_sfnt_off00006310.bin
9e6f7a657bdac39418844c47ec8fad86b88f25d26af48db272b122523ba57853		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6310 19632 bytes

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