Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52dbcc25473b36f…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 12:17:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 32738f11f33fdb495d9154d73fac8879 SHA-1: e76ce1ee162734f0cea17a1db993b8dcd7bafdc3 SHA-256: f52dbcc25473b36ff5ea66d62c8397d53b2504b97cdaadb2bb14de69dc2748f0
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on game hack generators and free in-game currency sites. The primary link, http://netcdn.tw/app/406889139/coin-master-free-spins-hack-link-game-hack, is a known redirector. The document's structure and content indicate a malicious intent to drive traffic to potentially malicious websites, likely for phishing or malware distribution.

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.tw/app/406889139/coin-master-free-spins-hack-link-game-hack PDF link annotation
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-hack-retail-tycoon-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/dowload-free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/freerobuxrobloxhacknosurveynohumanverification2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-hack-download-prison-life_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/hacks-in-bee-swarm-simulator-roblox_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
stream_002_off000032e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32E4 22732 bytes
SHA-256: b78e5005659c0cea2f8f455ea1425707f56628a3458053fbc0653b73c98a17c6
font_01_sfnt_off000065bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BD 18344 bytes
SHA-256: bda74eba5f039297e511dddd57f660cdccd001576784cab1ba2dc4ebdf08fb85

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