Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c08a83fbf08127…

MALICIOUS

PDF

36.2 KB Created: 2021-05-10 12:45:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 39ec847f17d500dd73700d0747fc1977 SHA-1: 482ae0c7dd5d4f1cbc5f7c08b145796d68cebc1a SHA-256: e4c08a83fbf08127daa7c045fb0df9a939f4771faa07c188d58606b772f70e0f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a redirector link disguised as a 'free generator / game hack'. The document body explicitly contains a call to action to 'CLICK HERE TO ACCESS ROBLOX GENERATOR' and links to a known malicious redirector. This indicates a phishing attempt to lure users into downloading a malicious payload.

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/ways-to-earn-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
stream_003_off000031b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B9 25092 bytes
SHA-256: a10c2f3dfffa6c970b986229fc36f0eb228b83a642e3e8358c4ed37117c2d9bf
font_01_sfnt_off00006b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B93 18456 bytes
SHA-256: a97dc755a6f2d2ed213355e04e982d1291fa69ee2bd0a77560176eb39858d63d

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