Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a33de34e9e42ca…

MALICIOUS

PDF

32.7 KB Created: 2021-06-29 11:49:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ec55cdb973b5b1b8b1e32ff39a00ef20 SHA-1: ee580a9e76e6c68f9e056331f5bda1fe81db80b8 SHA-256: 97a33de34e9e42ca082262f20af5fa8cd33929edc59b63df1a57cfe099307058
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, explicitly luring users towards game hacks and free items for popular games like Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this, and the ML classifier strongly indicates maliciousness. While no scripts were extracted, the embedded URLs are the primary indicators of a phishing or scam attempt, likely leading to a malicious site or a download.

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/how-get-new-outfit-in-roblox-for-free-game-hack PDF link annotation
    • http://zercalo.org/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-cheat-in-robux-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://zercalo.org/images/free-costumes-in-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/roblox-hack-fly-jailbreak_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-aimbot-cbro-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-without-human_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-card-codes-generator-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-ha-sido-hackeado-por-john-doe_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-freer-package-roblox-2021-july_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-hack-20210-robux_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_off00002c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C48 21244 bytes
SHA-256: 1ed5bc245970db1085ad62c2681fcc6c4aa0117511ecb1df7001ca6b684d95f3
font_01_sfnt_off00005a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A50 19180 bytes
SHA-256: 2ba336f1fddf255cfe195b4fabb4351297f061ad77bf75bf653a080f30e5a80d

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