Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9461a67a7e2aa5f…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 10:04:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2ecd39ef5f5c72b6b88e18746e153af4 SHA-1: 21d7e8251f8f86595eca5cbca6bf1338b7189524 SHA-256: f9461a67a7e2aa5ffa297ca4aab603814bc5f687211d423a49365f9697ea8ae1
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/free-coins-and-spins-coin-master-game-hack PDF link annotation
    • http://gts.edu.gh/library/repository/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/clothes-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-codes-real-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hack-menu-download_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/app-to-hack-roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-simulator-hacks_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/strucid-roblox-hacks-aimbot_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-do-you-do-the-speed-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-roblox-hacks-co_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
stream_002_off0000333e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x333E 23084 bytes
SHA-256: b8b1e517fe82556eaa15f68414e5454adef346b73e2994371180247a1d91432a
font_01_sfnt_off00006754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6754 18348 bytes
SHA-256: c90f632020bcb1e728f62a43997badda2860e0d329262e99dedc1f8a12c39115

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