Malicious PDF — malware analysis report

Static analysis result for SHA-256 edffab7fbc4ffe40…

MALICIOUS

PDF

40.0 KB Created: 2021-05-10 15:48:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6bf981b3df39ca8e4a8f9ca3db7eb074 SHA-1: 631838079c3ee9e116c71e43e6053290a13001e2 SHA-256: edffab7fbc4ffe40f83a3941092fa11aa7c01a8bff52384034982a0e8224a02b
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://netcdn.xyz/app/479516143/minecraft-windows-10-edition-hacks-game-hack PDF link annotation
    • http://androidthai.in.th/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://androidthai.in.th/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/how-to-hack-a-roblox-account-2021_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_003_off0000405e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x405E 25208 bytes
SHA-256: 1118457890380314d4bc268d3b5480dc3dba0ceea29bc1b3ce4fe068b47fb1b1
font_01_sfnt_off00007902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7902 18696 bytes
SHA-256: 57995c7d2e560419c32609fd78c9e8de7fe6f2ec65952b3fe21507803a80983b

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