Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec002697dbe43645…

MALICIOUS

PDF

34.0 KB Created: 2021-06-28 22:20:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6fb0bbc108b9aca71f2857927267e526 SHA-1: 7456c7c71fdcaf32fa3b43768eef4909978897a5 SHA-256: ec002697dbe43645d81eac57b7c5b2c11bf6f96f4ed6c0f0eafa0f0caa3ec871
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-build-a-boat-for-trasure-fly-hack-game-hack PDF link annotation
    • http://library.umuslim.ac.id/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-membership-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-no-human-verification-or-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-craftwars-hack_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robuxs-by-bananaman2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-hack-into-other-peoples-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-valentines-generator-just-clicks_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-not-fake-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-free-robux-for-real_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_off00002efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFC 21524 bytes
SHA-256: 61e3da3ea2e25087259d1afaa30d565c9a605b1edfe21667492a9170f64d8b39
font_01_sfnt_off00005e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E27 19540 bytes
SHA-256: b3787ece38a1a62969e1f640920b5ad8497a1f7640887f67376d79cb6421148f

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