Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda74845c84f5a6f…

MALICIOUS

PDF

28.6 KB Created: 2021-07-20 15:50:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6bbdfcfe04d52f6f0b469135ed5d7a11 SHA-1: 51fa9e5cc5b3f40562814f3e4427495e0d838c73 SHA-256: fda74845c84f5a6f20a0d50a0ae3dfc1c7ecf2d22ada0af1b3498e8789029ba9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector, disguised as a 'free generator / game hack' for Minecraft. The document body and heuristics confirm the presence of these malicious links, indicating an attempt to trick the user into downloading potentially harmful software. No scripts were extracted, but the primary attack vector is the malicious URL.

Machine Learning

  • Nyx PDF Classifier clean score 0.0329

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/479516143/minecraft-java-edition-download-free-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_off00001e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E50 21472 bytes
SHA-256: 9050f41639147b0d8c7ba72c9930deae52a0dc95a0fa315bbd3d3ef3a16d0fba
font_01_sfnt_off00004d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D47 18572 bytes
SHA-256: b44bcce2d8515c0d099a66814c088ed689798a3dbc3c1364cf14b7c888151b67

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