Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb820838d4c068b…

MALICIOUS

PDF

41.3 KB Created: 2021-05-25 09:00:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 792b7678f5e060fb91ed7d6878b42c08 SHA-1: 1040f21234bf4f3fce90b1c428a2889c5ca73ebd SHA-256: 9bb820838d4c068b853d222a3bf1cdc41d530a97ee4f91b028dd8b82b09c9d5e
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 0.8074

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/406889139/free-coin-master-coins-game-hack PDF link annotation
    • http://www.gadanie.lv/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.gadanie.lv/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gadanie.lv/images/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://www.gadanie.lv/images/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000034ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34EF 25392 bytes
SHA-256: a6ca8aed4f36e0d4c2a12a888979dac11fd560b27e0e83199eb5105d1cda9b98
font_01_sfnt_off00006d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D56 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off000081e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E1 17712 bytes
SHA-256: effefb876c7a76aa063811ff0160e46fb8a90dd5507c6c48ef6fa39823ab5c8c

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