Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29deeb9da2634ef…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 12:09:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6d4761c1f51447ee8711c5a8dbd58a7f SHA-1: fdfc1b5814afb3b1354cdc96c6973ae5a1d29e29 SHA-256: b29deeb9da2634ef4bd99f84533e2942fd181dc18f308b6c134541cb85405a9e
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/robux-online-game-hack PDF link annotation
    • http://perpus.fisip.unnur.ac.id/repository/roblox-free-fedora_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/hack-roblox-download-pc_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/cheat-argent-sur-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/fre-robux-for-real_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-free-full-download_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/hacking-tycoon-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/escaping-handcuffs-cheat-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-free-items-game_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-coins-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-cbro-skins-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-redeem-card-codes-2021-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-hack-client-2021-download_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/snowed-out-v2-roblox-hack-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-the-northern-frontier-hacks_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_off0000311c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x311C 22260 bytes
SHA-256: 98d28f291343d2f36f4bac461360a83ade4d5c326fcbdb82d1fb758dca200128
font_01_sfnt_off000062cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CC 18744 bytes
SHA-256: 0d65403b238a7007715d414cecaabb3c72f82c70eaf60aa0c41e152bd513deae

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