Malicious PDF — malware analysis report

Static analysis result for SHA-256 693a9bebaa53b77c…

MALICIOUS

PDF

38.7 KB Created: 2021-05-23 22:57:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2ca17600c0a7241844f86c183edca965 SHA-1: 1173176266b83eaab5baeb7ef089077301749a17 SHA-256: 693a9bebaa53b77caae24e130a498be55db6dfd06fa395741d9cfd02bfd970e1
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 0.9476

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/free-minecraft-server-game-hack PDF link annotation
    • http://behsanroshd.com/images/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • http://behsanroshd.com/images/coin-master-hack-no-verify_GM406889139.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_off00003780.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3780 29236 bytes
SHA-256: 1b4b5069e4b74c8a08e6dfc39e1b6b3efa2dff84fe9a1410d85702c4ed8d96c4
font_01_sfnt_off00007813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7813 17684 bytes
SHA-256: 971ebce79d03a5424fa8491ae570b1f65fe2ad06e00737069ab54be99501e2e8

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