Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9e1ba7e0d07c4f…

MALICIOUS

PDF

34.6 KB Created: 2021-06-25 17:27:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e219598efd8442936f3a27da5ed7f03f SHA-1: 096739612b68c45a5b15bc9723432d4e8a51252f SHA-256: cd9e1ba7e0d07c4ff5d511fd1750da6ee98b730501a54ef0f9c70bf36e32c6e6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and other PDFs, all masquerading as game hacks or cheats. The primary lure is for 'Voo Hack Roblox', directing users to 'http://netcdn.co/app/431946152/voo-hack-roblox-game-hack'. This URL is flagged as a malicious redirector, likely leading to further malicious content or downloads. The document body, though partially corrupted, contains similar URLs and references to game hacks, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/voo-hack-roblox-game-hack In PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/como-hackear-roblox-android_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/robloxhacks_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-hack-android_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/no-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-hacks-mpgh_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-free-robux-super-easy-and-fast_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_off00002f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F66 22888 bytes
SHA-256: 0181cf8b6b11aa09eb14431b060bf75a3d2cb578b730e7cf2bc301e798b9ab8e
font_01_sfnt_off000062c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C8 18788 bytes
SHA-256: 6645fea28d6ba7b832ad3ed2e78cac81417763277d080d183dc04e5d57855409

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