Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef29ac3a18cba79d…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 18:44:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 384998f1b89c68eb8e85650e71c5cd73 SHA-1: 22b13616441c9da5082640f7f2bf05ee60b9d23f SHA-256: ef29ac3a18cba79d4aa74f2aeecdb77c4159937cc3c2177987a1f9a2e8076672
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/431946152/free-robux-no-human-verification-no-survey-game-hack PDF link annotation
    • http://library.imz.or.id/repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/80-robux-free_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-free-shoulder-pets_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-make-a-free-robux-scam_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-free-expoit-that-run-loadstring_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-change-your-roblox-name-free_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-weight-lifting-simulator-3-cheats_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-no-survey_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_off00003063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3063 22452 bytes
SHA-256: e033a8882dbd7e8b5a9e27dec47df9cd23c6b70a4e40ed7091e4bb1bee6b1082
font_01_sfnt_off0000628f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628F 19628 bytes
SHA-256: 09331f1d479b06632facb78648812f66193fe8c97927eaaaed4247988ab7ba01

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