Malicious PDF — malware analysis report

Static analysis result for SHA-256 60faeb42c4012029…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 10:13:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fe9a773113c61dc3e83b6e47069d1da8 SHA-1: 123f95a03d3e267b82b5ed1080799a4e4c134a89 SHA-256: 60faeb42c4012029c6a48570537cd445abf3bafc18fb4559c77fc7c469e28559
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-spin-hack-2021-game-hack PDF link annotation
    • http://suaedy-library.net/repository/roblox-ajuto-clicker-is-it-a-cheat_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-hack-someone-without-their-password-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/get-free-lambo-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-use-cheat-engine-in-roblox-tycoon_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/cbro-roblox-hacks-june-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/do-you-want-free-robux-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/hack-list-for-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_off00003344.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3344 22596 bytes
SHA-256: 010d2b7d8147f2a50c217e83ef054a79a29027a5fdbc31355509578200f85fd2
font_01_sfnt_off000065d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D2 18580 bytes
SHA-256: 63d6adc7563b485c3174704ac8a7a6a262dc9bf1deaf17837918a23c7f43ebb5

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