Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df337336093227f…

MALICIOUS

PDF

37.4 KB Created: 2021-05-12 07:03:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6842bf7f9192bac8383556970f34568d SHA-1: 03aa89f457bf343fadc98d0ae551f0f0c5858907 SHA-256: 7df337336093227fbc3241ab21be4a0cdf0f87cce1a5a8cbf222b7a8b5867be3
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a malicious URL, masquerading as a 'Coin Master Free Spins Hack'. The heuristic firings indicate that the PDF is designed to lure users into clicking these links, likely to download a secondary malicious payload. The document body text and embedded URLs strongly suggest a phishing or scam attempt.

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/406889139/coin-master-free-spins-hack-without-human-verification-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_off0000358f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x358F 23812 bytes
SHA-256: a3e7f44859fa3a37f2fabd090750c07c5271fee5be0d0130e63124265bce25e7
font_01_sfnt_off00006ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA4 20116 bytes
SHA-256: 4f4bd586454d0339249c4066a93da09b405a76fab4199bfe500991058b822fd7

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