Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b13b9168211c6d…

MALICIOUS

PDF

33.5 KB Created: 2021-07-03 17:42:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 524c68c62ca5558d527fd423b5586ff3 SHA-1: b7392f92715d39e9a063857190fbfca2bdb4ddd5 SHA-256: 67b13b9168211c6d4cfe62e7bb7291bc1f25c27767fc4533e4034a2b7d0faad6
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, employing game hack and free account themes to entice users. It contains a large number of external links, many pointing to other PDF files hosted on the 'gts.edu.gh' domain, suggesting a link farm or redirector strategy. The primary URL, http://netcdn.tw/app/406889139/coin-master-hack-fast-org-game-hack, is also a clear indicator of a scam or malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/coin-master-hack-fast-org-game-hack PDF link annotation
    • http://gts.edu.gh/library/repository/free-vip-accounts-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-hack-on-ios_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/casper-hack-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-roblox-reedem-codes_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-star-wars-game-passes-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-on-roblox-phone_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-roblox-accounts-2021-payed_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_off00002f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2C 22332 bytes
SHA-256: 509eca4d55d9e7749ef6baf39c64973320a1891bfd83a443cfdb0a67182214f2
font_01_sfnt_off000060a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A4 18168 bytes
SHA-256: d952a74c9cb72cc49f5b54a2c88c13b6a4cd962dd0b14b2950186c215f4630d9

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