Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d65d5ed1feb84f…

MALICIOUS

PDF

41.4 KB Created: 2021-06-11 06:43:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4bc29a7ab22dc09ec870533885850129 SHA-1: cb99557ce51546367d16ba71ba7638ac8ae6ece1 SHA-256: 29d65d5ed1feb84f2233f4fc997671a7d85c67f46504f85ea34d4c045a080d71
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to entice users into clicking embedded links. The heuristics indicate a 'PDF SEO Link Farm' and 'Game Hack Redirect Lure', suggesting the primary purpose is to drive traffic to external sites, potentially for ad revenue, SEO manipulation, or to host further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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.tw/app/431946152/roblox-jailbreak-hack-app-game-hack PDF link annotation
    • http://firesafetyservices.biz/images/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/all-working-exploits-free-with-no-key-roblox_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • http://firesafetyservices.biz/images/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/who-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/roblox-speed-hack-script_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ff6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF6 25228 bytes
SHA-256: 41e82f47968aa1b215f37c9cfd1270564cbc0a51a8f206e7c32f9c208755ce76

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