Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0aadcfb8f5e58bd…

MALICIOUS

PDF

36.3 KB Created: 2021-07-03 18:09:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b030dea9b32b121995fa015125d38c09 SHA-1: 6113e74a9d2e2b292bda40812585055355e5de21 SHA-256: f0aadcfb8f5e58bdc0810be55a825996e22d927211bf9a2e3093cd7ba9770579
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of 'game hacks' and 'free generators' to entice users to click on embedded links. The primary link, http://netcdn.tw/app/406889139/fbchampion-com-game-hack, is associated with a redirector, suggesting a multi-stage attack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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/fbchampion-com-game-hack PDF link annotation
    • http://razredna-nastava.net/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-pokemon-brick-bronze-hack-download_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-uber-roblox-sound-id_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/what-tiktok-free-movies_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/face-png-roblox-free-face_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-hack-robux-on-android_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-quiz-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/hackear-cuentas-de-roblox-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/gaxly-hacks-roblox_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
stream_002_off000032e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32E0 24424 bytes
SHA-256: 04a535bc132603153b49edd9b24fb52959bd3de556a8c666d066a2bfdcc6b8a4
font_01_sfnt_off00006ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB4 18656 bytes
SHA-256: 5b63d62eabdfb7070366ffcdbeca1c67f897ffb042accd2c51ab2adc3e16efa4

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