Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b45b55743a94752…

MALICIOUS

PDF

39.0 KB Created: 2021-05-10 15:37:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5798bba7b6ff72f6cddd9db22e3e8032 SHA-1: 8fbf0c27806b8a4ada772f9cda570d32848e46d5 SHA-256: 7b45b55743a947526def79617fcf842ffa58a51367e0453f01152159fb4b2f68
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it links to a malicious redirector disguised as a 'free generator / game hack'. The embedded URL, https://netcdn.xyz/app/479516143/free-minecraft-capes-no-mods-game-hack, is flagged as malicious. The document body also contains similar links and a call-to-action phrase, reinforcing the lure. Although no scripts were explicitly extracted, the PDF structure and the nature of the links suggest an attempt to redirect users to potentially harmful content, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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 https://netcdn.xyz/app/479516143/free-minecraft-capes-no-mods-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000364f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x364F 24712 bytes
SHA-256: ae87724a10acaf0f7a4c0d60440d958cdb8dfbb1e9e3ac2c3a04a026bcd86cbf
font_01_sfnt_off00006d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8E 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off0000778b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x778B 18060 bytes
SHA-256: d2580fb4aafe993e5dab330080fdbce20cb4b143aeb227db28560abf8afc6474

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