Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca319a991d8fc2a…

MALICIOUS

PDF

38.3 KB Created: 2021-05-12 14:02:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 21b20c8d108175c5a20fd1c56635afd7 SHA-1: 72c381f7b105d77507da7a658fc5a5b8ef031590 SHA-256: 0ca319a991d8fc2ae046247313cbca39e5adfad6ef0f7ad349312f23f816008d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to a malicious URL, masquerading as a 'free generator' or 'game hack'. The document body also contains explicit calls to action like 'CLICK HERE TO ACCESS ROBLOX GENERATOR', indicating a social engineering lure. The presence of these links and the deceptive content strongly suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/robux-free-gift-card-org-hack-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
stream_003_off000032f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32F7 26428 bytes
SHA-256: 22c4f508a65f59a4e401a64eee12e40fcd58a4195254bc07d85df33fb0d8555e
font_01_sfnt_off000071d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D4 19096 bytes
SHA-256: bb2bfd1b5c80cb1744cd57562806e4410c1e72fb9e1ed3dff7cfd9b3dcead9ac

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