Malicious PDF — malware analysis report

Static analysis result for SHA-256 521603f24ea4dcf7…

MALICIOUS

PDF

32.6 KB Created: 2021-07-06 06:14:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 72f6408ba11d5fcff0795d6ad6228281 SHA-1: 2f035b8da6bea9b87b8771af62f77ec29254f518 SHA-256: 521603f24ea4dcf7255e1633c8ac9f1928b9e5ff208953bac2d897a36b7c8614
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 0.9824

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/instant-robux-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7//repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-hack-a-roblox-account-using-cookies-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/como-hackear-a-personas-en-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/hack-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/minecraft_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-hack-roblox-in-three-simple-steps_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-free-robux-obby-link_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-on-roblox-computer_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/pubg-uc-ykleme-hile_GM1330123889.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/earn-rbx_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/hacks-for-ninja-legends-simulator-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/hack-coin-master-for-free_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
font_00_sfnt_off00002a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A9A 22256 bytes
SHA-256: 076f1ecc29571f556975a3b85a81b43e09fbda8e6e5d1b79c43a4ab4abb3e0fa
font_01_sfnt_off00005b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9C 18656 bytes
SHA-256: 10778cf50566a743b8a9d5c76b238d9a386255a35829eedc12038ddb18342ac9

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