Malicious PDF — malware analysis report

Static analysis result for SHA-256 32684c0a10a79649…

MALICIOUS

PDF

38.9 KB Created: 2021-05-10 16:09:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c2ae3e79d26d33c7b1d5676e5738c8f8 SHA-1: 6d4db7d8ef4d363566292cd7dc48c19c54d35976 SHA-256: 32684c0a10a79649fee798b77522b965e525625a7aea484cab8ba1fd9598c3c6
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains embedded links that are identified as malicious redirectors, specifically promoting a 'free generator / game hack' lure. The document body and heuristics indicate a clear intent to trick the user into clicking a link, likely leading to further malicious content or malware download. The primary IOC is the malicious URL used in the lure.

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/free-robux-youtube-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_off00003293.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3293 29692 bytes
SHA-256: 46e8d1cceee53a2b764b6058d4ff4d57ebcf3dc809a079a0cb30ea559fff3ff8
font_01_sfnt_off00007707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7707 18280 bytes
SHA-256: de5b074060e7ee0fa0230ac6212805924cd4a5679e09505111534b28358c176b

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