Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4db0bc4a7b8031a…

MALICIOUS

PDF

34.0 KB Created: 2021-06-27 23:43:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5b90f091a051fafcf6987539cd93851f SHA-1: b05f5533bab39e243bf003a02c32171cab96d4ef SHA-256: d4db0bc4a7b8031a3491a684cef84109eb9e9d8756b7d7bbe185ba122bd68a46
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/roblox-how-to-get-free-clothes-on-phone-game-hack PDF link annotation
    • http://perpus.poltekeskupang.ac.id/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-speed-hack-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-one-piece-millenium-hack-script_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-how-to-get-dominus-hat-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-fan-page-giveaway_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_off00003015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3015 21524 bytes
SHA-256: e41b3ff33d99383ae8d37fbfc37dbd3536bda8250421d67661e2e6e31751ddf8
font_01_sfnt_off00005f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F29 19240 bytes
SHA-256: 2aed36d0b9295d677c337b48355377c0b424f7d337fdc15c172f24ed16e981d6

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