Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f29f7a023f47429…

MALICIOUS

PDF

35.0 KB Created: 2021-07-01 04:12:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e11060b6a49b82f839bb2e252a90de96 SHA-1: af5d88e96ef75b7d0d2a131f403e71304c26e6b4 SHA-256: 0f29f7a023f47429242e4917af2f18a728efc5ff21bf03ee27d372f6ce1c7fee
142 Risk Score

Malware Insights

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

The PDF document contains numerous links disguised as 'free generators' or 'game hacks' for popular games like Roblox. These links, such as http://netcdn.co/app/431946152/free-sword-roblox-catalog-game-hack, are designed to trick users into visiting potentially malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a tactic to drive traffic to exploit or 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/free-sword-roblox-catalog-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/how-do-you-get-the-ability-to-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-a-free-group-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-2021-download-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/zombie-illuminati-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-download-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/2021-robux-hacks-no-games-to-be-played_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-card-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/mistplay-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-anime-free-shirts_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/cruise-ship-tycoon-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/mcpe-116_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/kid-cheats-on-roblox-girlfriend_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-pokemon-bronze-brick-cheats_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_off00002fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC1 22956 bytes
SHA-256: 2c849e91d596ff1955752b41e11bef9f1a14cc2e70cfed64cbd5b0048b51450a
font_01_sfnt_off0000636a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636A 19092 bytes
SHA-256: 25a74cce7c2bb32071238591398941a84c47dbd09ceefcfb9e59cb3254de4c7e

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