Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5c31368cfc350d…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 06:44:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5d2e964833d0e0159dc2d3e86754fa29 SHA-1: 7685ed52e8c0d2fd88acd44e6eecd80f8131a04c SHA-256: ce5c31368cfc350d60b7e3162d4104807b2eedc0a416b005f5b2b2f2f7996012
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-spin-link-in-coin-master-game-game-hack PDF link annotation
    • http://chem.ipb.ac.id/kim/repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-hack-windows-10_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-printable-coloring-page-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/100-working-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/como-ser-hacker-en-roblox-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/without-pokemon-go-free-incense_GM1094591345.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-city-tycoon-2-cheats_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/can-you-make-a-roblox-game-for-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/with-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/easy-robux-today-com_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_off00002f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F09 22804 bytes
SHA-256: 4689fc85716e8cdcab1cdb77f791943d10531729be7611b63fcc2ec521e8d6e8
font_01_sfnt_off000061c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 18604 bytes
SHA-256: 94f729aa24bd525058865a50c70cb682e513454b4ef239aff09a14ed80715174

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