Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a2c213f1fd0aa3…

MALICIOUS

PDF

34.8 KB Created: 2021-06-30 02:28:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e5ab7b4b172343d310310d79fd991b18 SHA-1: 016997c8b6d65d9236ae35f8004465a4bd9b5c9e SHA-256: a3a2c213f1fd0aa3dff51772803607a9ac8cca16c643a99d10cb67cd87c1aa53
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 4

  • 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/all-free-rthro-roblox-game-hack PDF link annotation
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-codes-on-android-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-knife-in-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-hack-wearedevs-not-injecting-how-to-fix_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-in-roblox-easy_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/pokemon-go-free-quest-rewards_GM1094591345.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-into-a-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/is-the-roblox-cheat-detection-good_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-gift-card-ins-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-play-now-for-free-the-scary-elavator_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/goo-recording-for-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-fast_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_off00002f54.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F54 23172 bytes
SHA-256: cda611445a876a5dffb4cf24ec3bffbbfbc4a127c9021c3135a30c45a313ff1d
font_01_sfnt_off0000638e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638E 18920 bytes
SHA-256: c545ea05eaff1fe5ee6082df043ad64ffb2fb7a89e2cbaef615b130683de559a

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