Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6611265dd4c595c…

MALICIOUS

PDF

35.8 KB Created: 2021-05-11 20:00:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 17af45315eca135b8447c18865717b83 SHA-1: e43f2170aa4c1b15e715fe9e74b1ccfb8d9ce6ba SHA-256: c6611265dd4c595c226b3b5b3f034ea0d557787b72cab2d9cf391edebd0fdb36
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure for a "free generator / game hack" and embeds a link to known malicious redirector infrastructure. The document body text and heuristic firings strongly indicate a social engineering attempt to direct users to a potentially harmful website. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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/free-coin-master-coins-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_off0000335d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335D 24668 bytes
SHA-256: fe0de1bb6adce1492697be768a8c50d4fbfad19bf8b981e7b1cdd4362ce87f7a
font_01_sfnt_off00006c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C40 17712 bytes
SHA-256: effefb876c7a76aa063811ff0160e46fb8a90dd5507c6c48ef6fa39823ab5c8c

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