Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bdbb39d71577040…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 01:21:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 86af32a48c1551ec340779c37cafb490 SHA-1: abf0c1123dd6f1fd634469eb86937748790205eb SHA-256: 9bdbb39d71577040dbeeeef7160b64b37eb91be8860f1a64bfff7454d74c3acc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/cmaster-club-coin-master-hack-tool-game-hack PDF link annotation
    • http://library.unissula.ac.id/fe/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-lets-party-gear-testing-speed-and-jump-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/jailbreak-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-make-roblox-items-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/irobux-fun-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/vehicle-simulator-hack-money-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-accout-stealing-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/tiktok-free-generator_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-cheat-engine-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-free-robux-code-generator_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-free-robux-maps_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/flee-the-facility-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/real-coin-master-hack-2021_GM406889139.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_off00003308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3308 22436 bytes
SHA-256: 20dad5f9d2b85efe0c481e7c078eb5b551218e54cbaa3a4ffa87b6c360cf21ff
font_01_sfnt_off000064ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EC 18636 bytes
SHA-256: 45171ffaf5ae90d1dfb3b9cea1eb3a695a40e0c80abc363f0d8c7d6ea31f879a

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