Malicious PDF — malware analysis report

Static analysis result for SHA-256 740bd011031bfa16…

MALICIOUS

PDF

35.3 KB Created: 2021-06-08 17:42:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 10a7e513327ba41b3d642ba7ef8af99f SHA-1: fd037dabc7ba089f2e9aad1fae3c1073ddd025d9 SHA-256: 740bd011031bfa163808cb7746557f5107ad2e6590edc323b2163e94a5e35e55
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to pages offering free in-game currency or social media fame. This pattern is indicative of a link farm used to drive traffic to potentially malicious sites or phishing pages. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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.
  • 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.tw/app/431946152/how-to-get-free-robux-for-no-money-game-hack
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-to-become-famous-on-tiktok-free_GM835599320.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-robux-youtube_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/levvvel-coin-master_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/youtube-how-to-hack-into-builders-club-on-roblox_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-do-you-get-free-coins-in-coin-master_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-robux-no-generator_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-hack-version-2021_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-spin-link-coin-master-app_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-coin-master-androd-cheats-2021_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification-real_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-do-i-get-robux_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-robux-generator_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/roblox-free-roblox_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-robux-android_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005499.bin
6a5d239dca7064be21b84f29e40f4d16daf2df0d83655c40bfc1d2b4752d63b4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5499 27972 bytes

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