Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0404f7c9623afc…

MALICIOUS

PDF

36.2 KB Created: 2021-05-22 15:37:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1e2734727dd04f92d9e65cfdeec5dda0 SHA-1: a9f8974a7ff55e21a97509a8ae13186888b0ae83 SHA-256: fa0404f7c9623afcf3925f1d761fc840a6334a0ff10c949761c9ce1c5af8ca41
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 0.9492

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/479516143/play-minecraft-online-free-game-hack PDF link annotation
    • http://jkcoaching.nl/images/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/how-to-get-free-robux-no-verification-2021_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
font_00_sfnt_off00003568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3568 24924 bytes
SHA-256: 14943e6379d064e0138889cc32d05bbbaac4aa6956e8929269440e7b24fc7e3b
font_01_sfnt_off00006d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D17 17976 bytes
SHA-256: e953997c623ab1bd3546e7b188ca680e36d1015a1cf7f46efbbf98890a47325d

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