Malicious PDF — malware analysis report

Static analysis result for SHA-256 d050921ae1482266…

MALICIOUS

PDF

33.4 KB Created: 2021-07-09 23:33:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ebd307771e40096b3a2714e148833eb9 SHA-1: 267b72b6721a5473aed10347f9f966aec5841d1f SHA-256: d050921ae148226649c651037ed2e2d7a86a58d1d03d53bd4639160deda29513
142 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. 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 0.9824

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.tw/app/431946152/how-to-get-free-robux-no-human-verification-game-hack PDF link annotation
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/www-roblox-com-free-builders-club_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/how-to-hack-roblox-account-stap-by-stap_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/roblox-retail-tycoon-hack-save-game_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/roblox-studio-are-datasotres-free_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/how-to-hack-into-anyones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/rogue-roblox-aimbot-cheat_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/unlimited-gaming-hacks-roblox-generator_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/free-roblox-without-verification_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/roblox-game-studio-unblocked-cheats-download-guide-unofficial-chala-dar_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/roblox-800-robux-hack_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/get-robux-for-free-2021_GM431946152.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_off00002ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE3 21592 bytes
SHA-256: cde7ac6da65e1fe1563ba28605871fe6f7cc7384a14d1cbe536736b94dcd99c3
font_01_sfnt_off00005c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5B 19496 bytes
SHA-256: 1b5d617a8bdf7849f857e8bf3a00ea7a9d2795cdb388484b070bb3e34f65ceb1

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