Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d5d94a6da0fdcc…

MALICIOUS

PDF

35.8 KB Created: 2021-05-12 15:37:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 42036c98d15f65bf0b4f1c276a1a2408 SHA-1: c263d89b2d1e013997785cac91a6421b6f9175c4 SHA-256: f6d5d94a6da0fdccdef3e77f106af445422ff5f67175d38e727fd579cda7b1a4
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a malicious link disguised as a game hack generator, which is a common lure for phishing attacks. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URL 'https://netcdn.xyz/app/406889139/hack-coin-master-ios-game-hack' strongly indicate this intent. Although no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest it's designed to redirect users to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0282

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/hack-coin-master-ios-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_off00003443.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3443 24412 bytes
SHA-256: a0d9eda498eb491332ec863872cceff9e9a4c11e29dbf368677820e0dcb49a58
font_01_sfnt_off00006c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C44 17716 bytes
SHA-256: 4e3a035fcc4d7e34a70bc1936180ad88d62d1a278a85b436915b1920e97724ff

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