Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f8292ce70eda5d…

MALICIOUS

PDF

32.4 KB Created: 2021-07-20 13:22:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 19693170e55bc68c33107c11aca8b255 SHA-1: 8b8c5ba43b6080ba37b26c1c7339dbdf8328365f SHA-256: f1f8292ce70eda5d575289ef700b72cc44dd7eb144b805827c7dcea7918b35fd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of 'free Robux' and game hacks to entice users. It contains multiple embedded URLs pointing to domains that host similar lures, suggesting a phishing or scam campaign. The ML classifier strongly indicates maliciousness, and the presence of external links aligns with the typical behavior of such lures to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-on-phone-game-hack PDF link annotation
    • http://jenne-technik.de/images/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://jenne-technik.de/images/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://jenne-technik.de/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://jenne-technik.de/images/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://jenne-technik.de/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://jenne-technik.de/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://jenne-technik.de/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://jenne-technik.de/images/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://jenne-technik.de/images/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://jenne-technik.de/images/how-to-hack-someones-roblox-account_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_off000027b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27B0 23060 bytes
SHA-256: ae603ae86a4676a06c8f5dfda337b64a88cbadec4c5fdd0e8f64f6268439e792
font_01_sfnt_off00005b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B45 18788 bytes
SHA-256: 6852338db6f3c7567e169710b83fedb5698b09b1cf918a35efe09c4db198a139

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