Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0283a4af8dd7fdf…

MALICIOUS

PDF

32.0 KB Created: 2021-05-12 04:04:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e87e6f8083f9c38541ee17b7df34bb60 SHA-1: b8439991dd7087082a9d16688b1658b3188fb683 SHA-256: c0283a4af8dd7fdfdf1470889b58cf884609a7311b9a414ad4dce123b981fb82
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it links to a malicious redirector disguised as a game hack generator. The embedded URL `https://netcdn.xyz/app/406889139/master-coin-hack-game-game-hack` is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded content suggest an attempt to trick the user into navigating to a malicious site, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4169

Heuristics 3

  • 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.
  • 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/master-coin-hack-game-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_off000033cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33CF 25132 bytes
SHA-256: ed1bfcb64f0b93d5232921ad2116b30807cf32539736595919733886aa8b8fe3
font_01_sfnt_off00006c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C23 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7

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