Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4bc327d16fa9db…

MALICIOUS

PDF

36.1 KB Created: 2021-05-20 15:36:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 78e40b9e5afd724919d7d7a92db1eca5 SHA-1: 0eea8e9536efbfd6bba355439bd2eea92a6786cc SHA-256: 9c4bc327d16fa9dbcf026b69ebe180ce0cfd2cfdb3a62f414a55e10b2df72ca2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as a 'free generator' or 'game hack'. The document body explicitly contains a call-to-action phrase and a primary malicious URL. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful content or further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/479516143/free-minecraft-server-hosting-with-plugins-game-hack In PDF document text
    • http://prazdnik-kzn.ru/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://discord.ggIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003328.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3328 24376 bytes
SHA-256: a6ee281f3d5f0c006b8786bd024ad152f987c04c63fc72d5805501ae7fcfb6c4
font_01_sfnt_off00006a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6F 18844 bytes
SHA-256: acfaf3ec89f3d6287f10dcf224a7b6ca2fa14913dee94becfc4eecdab87a7a6c

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