Malicious PDF — malware analysis report

Static analysis result for SHA-256 6322c4a6cf36db6a…

MALICIOUS

PDF

36.9 KB Created: 2021-05-10 12:00:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 946e3a2064716649399bb481527c209e SHA-1: f6133c642601636b9ec109037e9cea12743b0513 SHA-256: 6322c4a6cf36db6aacf8f53ed577b8a5557f394cbffcc95bb49798ea702b32cd
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links pointing to a known malicious redirector infrastructure, disguised as a "free spin generator" for a popular game. The document body and metadata indicate it was generated by wkhtmltopdf, suggesting it might be part of a phishing campaign. No scripts were extracted, but the primary attack vector is the malicious URL used for redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0313

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/406889139/free-spin-generator-for-coin-master-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_off0000319b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x319B 27392 bytes
SHA-256: 3f71e0ae3143a0b53ef7fedea4a78a18dd868567711a8b2f0416828cc1bec430
font_01_sfnt_off00007011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7011 17884 bytes
SHA-256: 875ea20670cc53df10756da7fc56e77b8f1dde7185e9259fbb8a92495bb142d9

Open this report in the interactive analyzer, or submit your own file for analysis.