Malicious PDF — malware analysis report

Static analysis result for SHA-256 47947c3723cbe2b7…

MALICIOUS

PDF

37.0 KB Created: 2021-05-12 08:03:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2fcfa2e9d76decf490a04b4d0e14f896 SHA-1: fe9ef01ef1ac595e5a0a6ebc0e182bd3ea0e775f SHA-256: 47947c3723cbe2b7bd03aab8fe51900df8970dd4fce9455e634ee5623aa5eb56
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting a 'Coin Master Free Spins Hack'. The heuristic firings indicate that these links are associated with known malicious redirectors and lures for game hacks. The document body and embedded artifacts further reinforce the theme of a game hack generator, suggesting a phishing or scam attempt to lure users to a malicious site.

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-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_off000037cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37CB 24864 bytes
SHA-256: 3442454e0084216518b99fbc59d0ef9bbd2a755a7e960ee20aa933cb6130d6fe
font_01_sfnt_off00007023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7023 18056 bytes
SHA-256: 5bc30252b20e252a4e4f12754ee6fd7a8bdc905346c0352a18cf9aa56584dd16

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