Malicious PDF — malware analysis report

Static analysis result for SHA-256 618919b321110fe3…

MALICIOUS

PDF

41.0 KB Created: 2021-04-23 22:16:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3e5e2503c88cdbfe2d11dc04509840f2 SHA-1: 122d7536e1ada6ed120264e03af90c768ea5bb70 SHA-256: 618919b321110fe31026dfe799a589d5a89807f354d748f0462ad2b705a2f0c7
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 0.9941

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://netsecure.top/app/431946152/casual-shirt-girls-roblox-template-free-game-hack PDF link annotation
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/vechle-simulator-roblox-hack.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/hack-robux-site-robloxcom.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/my-roblox-gf-cheated-on-me.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/nice-roblox-games-to-hack.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-clothes-roblox-group.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/robux-generator-hack-2021-xonnek.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-free-outfit-ideas.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-toy-codes-free-2021.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-roblox-stuff-blue-hood.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-to-get-free-robux-no-hack-no-scam.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_003_off00004350.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4350 24760 bytes
SHA-256: 4d3b68292b2c465d89352a31b61cce544864254764deb09adba8bfcb0c240514
font_01_sfnt_off00007c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C35 19144 bytes
SHA-256: 77ead217eddd5f9a593105a59d5c463d2c45500cb004c85f778281e8fb13b064

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