Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97471d4fb640b50…

MALICIOUS

PDF

35.3 KB Created: 2021-06-28 06:13:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 43fb37b4fd861a13d5c42eeb3631cb36 SHA-1: 878fe30f013d21d9e689924131d55f5dc0bcee88 SHA-256: b97471d4fb640b50260b5d775ca18c8d8f1d5886f926354207fe86ef3fdbaba5
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.co/app/431946152/roblox-land-free-robux-game-hack PDF link annotation
    • http://psb.sd-alazhar29.sch.id/repository/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/roblox-yin-and-yang-ninja-assassin-hack_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-roblox-accounts-with-bc-2021_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/i-got-free-robux-doing-this_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/roblox-money-hack-cheat-engine-63_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-do-you-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-execute-code-with-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/hack-roblox-brute-force_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.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_off0000310c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x310C 23152 bytes
SHA-256: 723a8cef992fe187146c90cf66a8aaafb52d5300d5ede685f5e4e9ee274202dd
font_01_sfnt_off0000651e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651E 18964 bytes
SHA-256: 1fa119217ccc78f30bdc9129f012f8aa478324cb6e64aa60088b644191aaf69a

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