Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6191f3fd7b43237…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 20:25:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fcefc1c232e689f69e1492e884aaec09 SHA-1: 49f14d5d988a15290920bdc61064cc6759a81862 SHA-256: c6191f3fd7b4323796448ff1d2fbc3b1e14ccda57441045bc59c751d0161f7d3
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/479516143/hack-client-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-hack-100-works-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hack-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/codigo-hack-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-ipad-only-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-speed-hack-in-roblox-jailbreak-march-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-gamepasses-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/pokemon-go-free-gift-codes_GM1094591345.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-printable-roblox-characters_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hack-2021-lev-7_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_off00002fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD1 22420 bytes
SHA-256: f359fddeb8fa5f36a7c5a99f3afc3d79480464e7550fbb3dc241a03d493120de
font_01_sfnt_off000061b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B9 18100 bytes
SHA-256: b74c7ab906109e82ccbdd989a414c9f68291dbe0f36a424a38b948c3064475a3

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