Malicious PDF — malware analysis report

Static analysis result for SHA-256 41223493c739b3c9…

MALICIOUS

PDF

38.8 KB Created: 2021-05-24 03:07:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 005a97148cd1eab92ab2ada17a9adc40 SHA-1: 0a029904dba79e279b4c197a479ed58e69cba910 SHA-256: 41223493c739b3c9e7bfa01dfa7415e8d4e28fbaa1a010c7495c5205e65dd368
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'free generator / game hack' lures. The document body and heuristics indicate a clear intent to trick users into visiting these malicious URLs, likely to download further malware or engage in phishing. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious redirection workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-15-free-spin-link-of-last-5-days-game-hack In PDF document text
    • http://global-tech-security.be/images/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://global-tech-security.be/images/get-robux-com_GM431946152.pdfIn PDF document text
    • http://global-tech-security.be/images/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://global-tech-security.be/images/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://global-tech-security.be/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32A2 24624 bytes
SHA-256: 7964aa5828e9d2e3a8725c39922469ff098b640ef4b2d00a464535db37f9acb2
font_01_sfnt_off00006aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFF 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off000074ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74EA 18644 bytes
SHA-256: 4144dbe1534d0325d37e4c6129895ddb34a2bc26123e242025982d4ceef1bd2b

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