Malicious PDF — malware analysis report

Static analysis result for SHA-256 f829fd1c6ece5566…

MALICIOUS

PDF

43.8 KB Created: 2021-05-22 04:45:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 165d7ef2177db45dfe4e4c909fcf78d2 SHA-1: 864088d032e753cae343fcccbd148ad0cc7755bd SHA-256: f829fd1c6ece5566de7b9934a480dc2577460d522d217c5795cb62e2a676c405
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 0.9503

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/431946152/free-robux-websites-2021-game-hack PDF link annotation
    • http://lakeshistory.com/images/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/roblox-18_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_off00003448.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3448 38176 bytes
SHA-256: dd3765db1abd5cf7064f3fd93e65d0f74fa20a34ca52b5fdac292144e973af81
font_01_sfnt_off0000888e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x888E 18836 bytes
SHA-256: ef44fc6ccc8558fc54da3394cf76e38d99de94399ef86c3bb36f5b939f331685

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