Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba68d804a87f8c7c…

MALICIOUS

PDF

41.0 KB Created: 2021-06-03 14:07:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bb8ea65f4d2fcc3c232ca55c82cab682 SHA-1: 4fc1236be9348b70aedcd6a49275f8bf37f7e3df SHA-256: ba68d804a87f8c7c055ebb36bbdb261d8b36537241b95d107c06b32ae878ca5d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising a "free Robux generator" or "game hack". The document body and heuristics indicate a lure to trick users into visiting a malicious URL. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript for malicious actions, and the redirection is a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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.online/app/431946152/free-robux-without-any-verification-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_004_off00003cfe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3CFE 28060 bytes
SHA-256: 287353cb8869493e060e5133d377263f5f8bad89b36ae3a83a8c5b88553aca82
font_01_sfnt_off00007c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6E 19144 bytes
SHA-256: f37955fcb4845292a10cf385cf7825d095aa25907e4328d2f78dbaed4e94b6f7

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