Malicious PDF — malware analysis report

Static analysis result for SHA-256 5974b469259d4112…

MALICIOUS

PDF

34.1 KB Created: 2021-06-19 16:10:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b054e0b34f9b609d4d6c5e753e4810c9 SHA-1: a68cd3fc91e65bbde0057b56e29e3efb75564178 SHA-256: 5974b469259d4112c0b652a5f0a0eee6441375f1af4ec12d79f18a38e21efd14
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/get-free-stuff-on-roblox-2021-game-hack PDF link annotation
    • http://digilibfisip.unla.ac.id/repository/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/descargar-hack-roblox-sin-virus_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/earn-free-points-for-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/for-roblox-launch-for-free-vip_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-glitch-on-xbox-one_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/get-free-item-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/is-roblox-getting-hacked-right-now_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-shinobi-life-free-spins-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/master-coin-free-spin-daily_GM406889139.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_off00002e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E79 22028 bytes
SHA-256: 7b267b2056b5e8e89dd605e5745cfda5e80d9c19615c7bce1dc00c9b4a2237b8
font_01_sfnt_off00005f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3F 19296 bytes
SHA-256: f9a7c5f7769689f9ca6a63ee0eea33730b1e3a9775b101496d0619834162632d

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