Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f653e6981aeeac3…

MALICIOUS

PDF

39.0 KB Created: 2021-05-10 13:28:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8cb464610ac750625b5d469b40a8bb89 SHA-1: 8751a45c507d6a9b8e88cff45ff6446665a5c3e3 SHA-256: 4f653e6981aeeac349ec0db65c8dff6083c8e5618dba3d4e661aecb718e442b0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to redirector domains, masquerading as game hack generators. The primary lure, 'Coin Master Online Hack Generator', is designed to trick users into clicking a malicious link. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9438

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-online-hack-generator-game-hack In PDF document text
    • http://www.copoint.co.uk/images/robux-cheat_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-xbox-360-free_GM479516143.pdfIn 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_off00003a39.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3A39 27892 bytes
SHA-256: e8217d33353d643559ed7d2d230701783802c974964091744c975c7d36763549
font_01_sfnt_off00007852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7852 17788 bytes
SHA-256: ad851a765ea361b6c06a758d3cf3a23c1a0806d07c65aa9d09c455148703e502

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