Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a262ae3132aadf5…

MALICIOUS

PDF

35.0 KB Created: 2021-07-08 16:08:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d3bbc54ed2b9d7de515c9ef88cbfcd70 SHA-1: 6b80672ff89857d7a58ca680c61d8d1d7eb3aaac SHA-256: 7a262ae3132aadf5b2e2bc1e8d2344150eb4097030cf01c30e5e034f12a1806e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, that point to external websites. These URLs are designed to lure users into downloading potentially malicious content, such as game hacks or cheats. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of this PDF.

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/coin-master-link-spin-game-hack
    • http://perpus.smkn1pemangkat.sch.id/repository/best-roblox-hack-executer_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/minecraft-pocket-edition-mods-for-free_GM479516143.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/claim-coin-master-free-spins_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/free-roblox-accounts-with-builders-club_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/free-robux-today_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-ultra-attack-hack_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/apps-to-get-free-robux_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-unlimited-spin-hack_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/hack-for-texting-simulator-roblox_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-hack-xyz-download-free_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/free-robux-com_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/minecraft-pe-hacks-ios_GM479516143.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-hack-using-lucky-patcher_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/get-roblox-for-free_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031b9.bin
d471c2ff73889807c595627c46a74f02a3019dde70974136fd18df6e58b927f6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B9 23452 bytes
font_01_sfnt_off0000667d.bin
accd6e67d97fb62f461d44488d0438595f4e2a81ab0ce48d14b069d0d100ad1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667D 18180 bytes

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