Malicious PDF — malware analysis report

Static analysis result for SHA-256 35270fd97a3b332a…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 06:05:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5ee72392a6b770aa25b3fce22867b34e SHA-1: 90e0bf87bb3843791f3f769e507f3a0cb59361cb SHA-256: 35270fd97a3b332a4f43db49815640183c8c3a4a945a8d5186a864ca6287c423
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a "download button" lure, strongly suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence. The document body and embedded links promote free in-game currency or cheats for popular games, aiming to trick users into visiting malicious URLs.

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-unlimited-coin-master-online-tool-game-hack
    • http://sdn4-wates.sch.id/akasia/repository/coin-blogspot_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-robux-admin-cheat_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-no-human-verification_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-redeem-code-free_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/roblox-glitches-and-cheats-2021_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-roblox-accounts-with-obc-and-robux-2021_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-spins-on-coin-master-link_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdf
    • http://sdn4-wates.sch.id/akasia/repository/easy-ways-to-get-free-robux_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-spins-on-coin-master-game_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-spin-today_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-without-downloading-apps-2021_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/how-to-play-roblox-free-on-xbox-one_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/roblox-free-robux-reddit_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/ear-free-spins-for-coin-master_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/roblox-team-fortress-2-free-to-play_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-roblox-usernames-and-passwords_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-a-free-dominus-in-roblox-mobile_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003300.bin
83f404174bc8dfc96204e9c251366cb76a97d01aabfaddb5356b887f69eba616		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3300 23308 bytes
font_01_sfnt_off000067af.bin
09a14abc89cf1cc1107afeaa94896f61f5bd3a4bff022e781ce519377058aa2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67AF 18692 bytes

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