Malicious PDF — malware analysis report

Static analysis result for SHA-256 81744a439931a4ef…

MALICIOUS

PDF

34.4 KB Created: 2021-06-26 01:47:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 54fcb446b0bbd28f35bb27bdd8651a5a SHA-1: b6bbe6768340a310de4b3ca6b3900997cffe73a1 SHA-256: 81744a439931a4ef0f89f11c0d99e08318062be49318c085bf782d3044caca91
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links designed to lure users into downloading game hacks or obtaining free in-game currency. The heuristic findings indicate a 'PDF SEO Link Farm' and a 'Game Hack Redirect Lure', strongly suggesting the document's purpose is to drive traffic to malicious sites. While no scripts were explicitly extracted, the nature of the links and the ML classification point towards a malicious workflow, likely involving the exploitation of user interest in free game-related content to deliver malware or redirect to phishing pages.

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/roblox-game-online-free-download-game-hack PDF link annotation
    • http://wadimor.co.id/media/imagesfiles/free-tiktok-likes-and-fans_GM835599320.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/best-jailbreak-hacks-for-roblox-ooooof_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/code-free-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/why-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-royalty-free-music_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/best-free-troll-avatars-roblox_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/hack-de-roblox-robux-infinito_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-points_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/cm-spins_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_off00002cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CD1 22768 bytes
SHA-256: e954c4a98ab5648ba65b2e15bfe088bb7674a1bb4afec90492b2320421193843
font_01_sfnt_off00005fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD1 19536 bytes
SHA-256: defe1e6d82bb955722abe57284907dcaa83de419b57412e96bf5eb4643f560f5

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