Malicious PDF — malware analysis report

Static analysis result for SHA-256 949ef97979681a8b…

MALICIOUS

PDF

37.6 KB Created: 2021-05-16 17:03:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2add48e5b9ce5e528f73e973f10ec29f SHA-1: 608426032632427130bfb0d42a5e26f6200fcf1f SHA-256: 949ef97979681a8bcb020c816e438052a79bc25910959d13f0279e9f7cae06af
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that are identified as malicious redirectors, specifically leading to a "Coin Master Free Spins Hack" lure. The document body also contains text and a call-to-action phrase, 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', reinforcing the social engineering aspect. The primary IOC is the malicious URL used for redirection.

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_off00003aa6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3AA6 24648 bytes
SHA-256: b4324293c16d4d1e6925d9e1371c653e4b8eb2d482db12bb5d85f4a6680f05f3
font_01_sfnt_off00007284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7284 18056 bytes
SHA-256: 5bc30252b20e252a4e4f12754ee6fd7a8bdc905346c0352a18cf9aa56584dd16

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