Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca692ff8d657d8e1…

MALICIOUS

PDF

42.2 KB Created: 2021-05-16 01:32:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 10770ac9e4f73ea7878ae73338f4d991 SHA-1: 1ac7532fe51ced064a465ce51916d7cb8d2cda7f SHA-256: ca692ff8d657d8e1dbde94378bb4eed0d1b7f3ed63d512e1a46890947c2d14e5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, pointing to a malicious URL. The document body also explicitly contains the same malicious URL and numerous other similar URLs, reinforcing the lure. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves tricking users into clicking links that lead to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/hack-coin-master-2021-game-hack PDF link annotation
    • http://manfeld.dk/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://manfeld.dk/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/minecraft-free-ios-2021_GM479516143.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_003_off00004914.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4914 26164 bytes
SHA-256: 21c60cc9d04a17c027b9ec7d0286fb0b3ebd37358e523f713af92b6422770a75
font_01_sfnt_off000082b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B6 18116 bytes
SHA-256: a3df71077179c7440b1e4836f0868e786a4fbdd8e53d65e7c5dca2578e10a822

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