Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bab9c5b13a3a6c…

MALICIOUS

PDF

35.9 KB Created: 2021-06-26 21:09:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b6c2812157bf80595c6f789eaade4e40 SHA-1: aeb20315e395d1f288aadccc7e5a23a9e4de1ec3 SHA-256: 46bab9c5b13a3a6cb41f21f7fc5fe875377132ba46df4aa60dd9a0d2e12b3cfe
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 0.9980

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/comment-installer-un-cheat-sur-roblox-game-hack PDF link annotation
    • http://repository.unla.ac.id/repository/demonius-free-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-a-free-robux-to-subscribe_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-2021-july_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-roblox-accounts-with-builders-club-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-hack-for-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hack-para-jailbreak-roblox-2021-dinero-infinito_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/all-free-clothes-in-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-roblox-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hacking-my-friends-roblox-account_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_off00003374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3374 22984 bytes
SHA-256: 3fa4a4703017f47aea37d03b48e83a1b52646612182e1b607b35e391048e11e2
font_01_sfnt_off00006714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6714 19156 bytes
SHA-256: a562284ecaf5e2cdd20b44f9e9edbfad26f010b1046655f57865f83e2d35a81a

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