Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd6b9d8e3f9e85c…

MALICIOUS

PDF

35.4 KB Created: 2021-05-24 02:59:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 69b9bc78462b5467388d7bc632a228ba SHA-1: 4c3562a1362b98b3c00ad9a8d552f06a7df8d309 SHA-256: 1bd6b9d8e3f9e85c1d71f413d0b2986dfcbdf494d6dcf4e7b819ed48d8f43684
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links, including one flagged as a 'free generator / game hack' lure. This suggests a social engineering tactic to trick the user into visiting a malicious site, likely to download further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/835599320/tiktok-likes-free-game-hack PDF link annotation
    • http://ines.co.rs/images/free-robux_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://ines.co.rs/images/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-online-free-no-download_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_off0000314c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x314C 26244 bytes
SHA-256: 69a79b0716f606d7bd4e0b7f6713d4e25db6347cf5604276fc5eff9c1c69fe04
font_01_sfnt_off00006b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6D 17456 bytes
SHA-256: 6bc07a916d4e04dd857b15fc22f6a85a1633f574b63a4730ea8dc15634c660b5

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