Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc16c411d1952b1…

MALICIOUS

PDF

36.1 KB Created: 2021-07-04 21:44:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 484dc811f7e2b8d0b83878b90f3fdb06 SHA-1: abc152dc5489ef5a75143370e8b389c7105c70d1 SHA-256: 3fc16c411d1952b1a5e07262c25c88ba9b6d34e18f22c933a5654375824a15b6
162 Risk Score

Malware Insights

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

The PDF contains lures for game hacks and free currency, directing users to multiple external URLs. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of linked PDFs, suggesting a tactic to manipulate search results or distribute further malicious content. No scripts were extracted, but the extensive link farm and lure content strongly suggest a phishing or redirection campaign.

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/431946152/robux-free-promo-codes-game-hack PDF link annotation
    • http://1.179.208.67/ckfinder/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfPDF link annotation
    • http://1.179.208.67/ckfinder/userfiles/files/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/youtube-hack-de-juegos-apk-robux_GM431946152.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/free-robux-codes-for-free_GM431946152.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/discord-free-robux_GM431946152.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/roblox-cheats-how-to-get-free-vip_GM431946152.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/dooms-pike-brickbattle-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://1.179.208.67/ckfinder/userfiles/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D4 23424 bytes
SHA-256: 84bcd39232ef4caa3eb2d8f9c5fb78fa8d5f63bed7664ce311aade0b8f7d6127
font_01_sfnt_off00006777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6777 19304 bytes
SHA-256: c1af96096ee4fe66b31908d73526086302c421ddc21d11abc86e2e14451b0c0a

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