Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafbb4b636ad048f…

MALICIOUS

PDF

35.2 KB Created: 2021-06-30 02:04:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8c89fba951a07cadc252db247ce37039 SHA-1: 248b44e606dc08a68d0fd5999e5f65ef7ad4a874 SHA-256: cafbb4b636ad048f947a75c9daaebc829ed8aa3709bbc7c428632f7e79db6468
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.co/app/431946152/roblox-free-stuff-2021-game-hack PDF link annotation
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-catalog-items-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-without-downloading-games_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-use-cheat-engine-65-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/bux-land-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-giveaway-live-now-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-promo-codes-july-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-item-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/saber-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-skin-roblox-download_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/websites-that-give-you-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/change-your-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/dragon-ball-fury-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-accounts-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-robux-and-tix-hack-no-survey_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-phantom-force-cheat-dill_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-do-you-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robux-hack-2021_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_off0000310e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310E 22560 bytes
SHA-256: 93ed2acc6e1185676f8f193b6c7f518c349eb649c54fc1b373b3d8a9c01af62f
font_01_sfnt_off00006390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6390 19296 bytes
SHA-256: 553a970bdfda02850da3d2179dd27a80da1a29edb2869a53e4460a60e2be98b8

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