Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4682afdc887f68…

MALICIOUS

PDF

36.0 KB Created: 2021-05-11 17:43:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0de308bfc2133c89afa55369322baf4d SHA-1: 4842f6a66389ea424968a68bb0e0536d6bd98696 SHA-256: 6b4682afdc887f68fe49f3921b8d546635d6efe48d295c0f03706ef5e192ddb6
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to a known malicious redirector infrastructure, specifically advertising a 'Coin Master Hack'. The document body and metadata indicate it was generated by wkhtmltopdf, suggesting it might be a crafted lure rather than a typical document. The primary heuristic firings confirm the malicious redirector and the game hack lure, indicating the intent is to trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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/coin-master-hack-with-facebook-login-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_off00003315.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3315 24360 bytes
SHA-256: 50a3feee2526d8daa0a4d89228ffa712a3f0f9c5faae21099498621cf26dc6bf
font_01_sfnt_off00006a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A02 18688 bytes
SHA-256: 749705fc09f79508956169531e0f53da1cf92baf18e5ef239c7c9518cbf3631e

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