Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49579e0f7c830aa…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 15:53:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2155782f2199c63496a0c875ec8b5944 SHA-1: 5f9322289be3fb991fe2176af37ba3260b9f41d9 SHA-256: e49579e0f7c830aaa2390fb764cb2fa90c1ce7fa8f0df9eb3af2e783ef4c5e4f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which are SEO-optimized to appear as legitimate resources for popular games like Roblox and Coin Master. The primary URL, http://netcdn.tw/app/406889139/free-coins-coin-master-link-today-game-hack, suggests a lure for in-game currency or cheats. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links designed to manipulate search results, a common tactic for phishing or malware distribution. The ML_NYX_PDF_MALICIOUS score further supports its malicious classification.

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.tw/app/406889139/free-coins-coin-master-link-today-game-hack
    • http://opac.salatigakota.go.id/slims7/repository/roblox-how-to-get-free-robux-2021_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7/repository/deleting-baseplate-roblox-hack_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-obux_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7//repository/games-to-get-free-robux_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7/repository/does-roblox-ban-people-for-hacking_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7/repository/roblox-cheat-engine-table-fly-hack_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7/repository/how-to-hack-target-roblox_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7/repository/free-limited-items-roblox_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-free-spin-link-app_GM406889139.pdf
    • http://opac.salatigakota.go.id/slims7/repository/wallythemad-s-cheat-for-roblox_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7//repository/roblox-promo-codes-free-robux_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-codes-2021-no-survey_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7/repository/aimbot-hack-roblox-comnand-promt_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7/repository/my-brothers-roblox-account-got-hacked_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7//repository/free-coin-master-spins-link_GM406889139.pdf
    • http://opac.salatigakota.go.id/slims7//repository/roblox-army-free-robux_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-without-any-verification_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7/repository/beyond-roblox-hacks_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7//repository/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002e7d.bin
ec46bc97dbe47497c0593ca14069d758cbd1c5baa53f104e4fd0549aebb35929		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E7D 22340 bytes
font_01_sfnt_off0000602e.bin
297430194eb73c4ac2f61cbe4529582c63f21c54530b07b0a2ae70a59bdd50b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x602E 18524 bytes

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