Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9406e006c6d15ed…

MALICIOUS

PDF

32.9 KB Created: 2021-07-05 05:39:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e2c19a7435a44399a291fbae56bd2e87 SHA-1: 1bff2d51c27acfd43ce424c40c928a8d7a801b80 SHA-256: a9406e006c6d15ed75f065b9a54dbf5b5a077b93c262aa22bab1c76cf23e09d5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are presented as 'hacks' or 'free items' for popular games, indicating a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports its suspicious nature. No scripts were extracted from this sample.

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/431946152/mathep-game-hack PDF link annotation
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/infinite-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-obby-no-scam_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/minecraft-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-fly-hack-in-sword-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/roblox-apocalypse-rising-hack-codes_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/secret-free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC1 21864 bytes
SHA-256: 4cc9c2e4f1ed1d6182c5c8126d732fc00e597f43d7694ecd50f1097784a02dd4
font_01_sfnt_off00005cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDE 18544 bytes
SHA-256: 49092de834d3f8fc0161edca5c8ffc9035116622ffbf8cd5420aeadd749a8349

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