Malicious PDF — malware analysis report

Static analysis result for SHA-256 701d24eab5598c7d…

MALICIOUS

PDF

44.4 KB Created: 2021-05-12 04:31:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 800747f8219dca19a489a2263fe833ba SHA-1: 13bd66e4119885d067d49157618343e2436cb27f SHA-256: 701d24eab5598c7db994c7617b27e905cb164b4a5738743f6fcc2da68d008541
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 https://netcdn.xyz/app/431946152/free-robux-without-any-verification-game-hack PDF link annotation
    • http://library.darmaagung.ac.id/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/coin-master-tiradas-gratis-2021_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
stream_003_off00004b96.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B96 26712 bytes
SHA-256: 89ef1d8aaf836dea3dae1ca4b6202ed99b76cd1ff6b4ae38e0c935d2f3b482a5
font_01_sfnt_off00008891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8891 19144 bytes
SHA-256: f37955fcb4845292a10cf385cf7825d095aa25907e4328d2f78dbaed4e94b6f7

Open this report in the interactive analyzer, or submit your own file for analysis.