Malicious PDF — malware analysis report

Static analysis result for SHA-256 85bde4b46904f6ea…

MALICIOUS

PDF

35.1 KB Created: 2021-05-19 23:02:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 79fa814b0fdaa284089548e716cb07b8 SHA-1: ec623e710d10f858f28fbd1bceed476e6fbe4834 SHA-256: 85bde4b46904f6eaccf069478ce1a3b01a65ef23c8fc37954ad213eaa1372f37
72 Risk Score

Malware Insights

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

The PDF file contains a prominent link and text related to a 'free hacked client' and 'game generator', which is a common lure for malicious downloads. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this, pointing to the URL https://netcdn.xyz/app/479516143/best-free-hacked-client-game-hack. This suggests the document is intended to trick users into downloading potentially harmful software.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/best-free-hacked-client-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003229.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3229 23956 bytes
SHA-256: 67a3c604076b46dfcd6a49f7e5d0c31ff9d6657055af6e0c6d8345396a4937e5
font_01_sfnt_off0000680f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680F 18200 bytes
SHA-256: f9e1919cba188461631b4d1f41fa639bbd05523e10553c39d41e2ec7b66d941b

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