Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd507ae962c47510…

MALICIOUS

PDF

37.3 KB Created: 2021-05-23 19:10:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 61f626ec5319d43862030da19ee64199 SHA-1: fbcd184a575330372e2397be7b6dd8f84880e4ee SHA-256: cd507ae962c47510bf9b216563a9f28213ea9d06e94d84d00ca31276f00d54f3
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirector domains, masquerading as free game hacks or generators, and impersonating brands like Microsoft. The document body explicitly contains a call-to-action phrase 'CLICK HERE TO ACCESS MINECRAFT GENERATOR' and numerous URLs that likely lead to malicious content or further exploitation. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/479516143/minecraft-windows-10-free-with-java-game-hack.
  • 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/minecraft-windows-10-free-with-java-game-hack In PDF document text
    • http://solidkom.ch/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/free-robux-now_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://solidkom.ch/images/minecraft-thumbnail-maker-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_002_off00003571.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3571 25092 bytes
SHA-256: d3ed72a914d3fd2cb2a57293f0612fdcecfa0d1c77f070e3ef3a1d414421e060
font_01_sfnt_off00006e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E62 18972 bytes
SHA-256: ec0d7e7957d6d3ec4a312ebe7c12434b242d64f4f861d318395950ba1ef4cb73

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