Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bfb6183b81b388…

MALICIOUS

PDF

35.8 KB Created: 2021-05-10 18:07:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 12f4f588400499b36252e16bf466e6a9 SHA-1: 2d0427ab74d47bb5e960f5b20a63d3a61768530a SHA-256: 72bfb6183b81b388655f15767534dd16d200a69d3fec66f78f848f51c79f9bef
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically a lure for a 'free generator / game hack'. The embedded URL leads to known malicious infrastructure. The document body also contains a call to action to 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and malicious link suggest an attempt to redirect the user to a site that likely hosts a malicious payload or initiates a further download.

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-heaven-free-spins-today-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000332a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x332A 24220 bytes
SHA-256: 8cda685808241944bf25a5801454588148f22a93bc88e61c60c32d1f1154d0ae
font_01_sfnt_off00006a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A61 18356 bytes
SHA-256: 60a5a430713f1161b8494f77535ec8b7c572fc0a829325370a59d32a1885166f

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