Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef96a9eaf6e0a60…

MALICIOUS

PDF

36.1 KB Created: 2021-05-20 20:10:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e95730bcf1dc309869a52a1c8ad6361a SHA-1: aab4c55347088c78253e01b9431ef0180e3816c4 SHA-256: bef96a9eaf6e0a60603db7cb21c0091be0aedbb30f049b3edd196a6e4623a2c6
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/431946152/free-robux-script-game-hack PDF link annotation
    • http://gbp-trabkiwielkie.pl/images/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-coin-master-spins-2021_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_off0000337c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x337C 25380 bytes
SHA-256: ca0d6ee2999221dea5b751989fd2bb0b40ceb9a9caf42c0414112fb340bc445e
font_01_sfnt_off00006b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B50 18416 bytes
SHA-256: 7904477eb6282cb79bb1f8d95588be1a5283b3abf5667e30a4d761915d4b26ef

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