Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec6f6c68df37fec…

MALICIOUS

PDF

45.8 KB Created: 2021-06-11 07:48:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 024309bb4676fdc16baae1e671b9824f SHA-1: 201e154b95d21a6d93d22a39ca8b3f6952026e42 SHA-256: 4ec6f6c68df37fecf9d2d19c4bf569ba24f19cfc738ea7b16e357ecab7c24800
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 0.9864

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 https://netcdn.tw/app/431946152/roblox-free-robux-android-game-hack PDF link annotation
    • http://library.atim.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-tshirts-fixed-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-andoid-robux-hac_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/madcity-roblox-cheat-5m_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-stream_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_004_off0000508a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x508A 28460 bytes
SHA-256: 839bc741dffb34040808ad146369cf3a917475f4fe6cb2fadcf210146e7a340c
font_01_sfnt_off00009073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9073 18384 bytes
SHA-256: 93bce50a849e1245667b1e0722847be6187f7d8af72f48628a9d369095fd5c9d

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