Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ca05ac24ca19f0…

MALICIOUS

PDF

36.2 KB Created: 2021-05-19 05:04:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7c1294bdf86aaf05f77b83088fec2778 SHA-1: 7a3c056f56df34052264e7eaad5e2273c3188748 SHA-256: a3ca05ac24ca19f02215ed49afa4ba97d319bda2f4130780fc04cc4f65e9cd9f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a malicious URL. The document body also contains a call-to-action phrase and the malicious URL, reinforcing the phishing attempt. While no scripts were extracted, the primary attack vector is the embedded malicious link designed to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0302

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/431946152/bloxland-earn-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_off000033aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33AA 24500 bytes
SHA-256: eab9ece896fc3d442d6441063b0402be2f211c835e632c649fd3ae10a0f04c30
font_01_sfnt_off00006ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA0 18492 bytes
SHA-256: fc87a0e838629003b9f405fc2c8429e0a8062f092f4b8629944097aaaaee9c58

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