Malicious PDF — malware analysis report

Static analysis result for SHA-256 6603b04e40f2c66e…

MALICIOUS

PDF

32.8 KB Created: 2021-06-20 16:02:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9a90b29c120ffdfa02dba00ba4e3e221 SHA-1: 65f262a49a1ceb45c933b79d4a775c697c1b5299 SHA-256: 6603b04e40f2c66e1c7bd83350eb630604db9fed9e5c6f57cfa25e0746e4ca6c
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, presented as lures for game hacks and generators, which is a common social engineering tactic. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or redirection scheme. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the document's structure and embedded URLs point towards a phishing or malware distribution attempt.

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.co/app/431946152/free-emotes-roblox-game-hack PDF link annotation
    • http://dygmotors.com.py/images/hacking-is-allowed-roblox_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/how-to-get-free-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/bc-free-roblox_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/roblox-hack_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://dygmotors.com.py/images/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/roblox-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/roblox-18_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/how-to-hack-super-hero-tycoon-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
font_00_sfnt_off00002b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B45 21832 bytes
SHA-256: 2733ef05f2c2466beab18d3636d45b0e3719bd432d4f48e5b9d05b22f8d81847
font_01_sfnt_off00005b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B03 19016 bytes
SHA-256: 6386384152de336741b1b9d5d6c0553e62f6d8da02e98adfd21e33042d148425

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