Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa9ce1c3330d98d…

MALICIOUS

PDF

29.0 KB Created: 2021-07-22 09:37:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0c130d091725614ffce4ba1463f67f58 SHA-1: c2e96510a4b87908f65cf3144eea5316b5ed7a42 SHA-256: caa9ce1c3330d98d01913b9cb7d041cdc6100fa00caffae79b1bfea9ad02af88
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to a website offering a 'free generator / game hack'. The document body and heuristics indicate a lure designed to trick users into visiting malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier clean score 0.0553

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-do-you-get-free-robux-game-hack In 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_off00001dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD2 21864 bytes
SHA-256: 7500e6b82e7452cd3977c3a9247fbdf8febbfed0eaf4110044bf0acf81cb960f
font_01_sfnt_off00004e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E09 18800 bytes
SHA-256: 64b81e7dea9d6b164c4a021c42f6f492211f9ee10bb45cf8b894c542524a57a6

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