Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ad4c3432409aa0…

MALICIOUS

PDF

26.3 KB Created: 2021-06-26 17:06:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 064fdec4666c70c806fdd72774764999 SHA-1: fd046e7c634b83476684cdff0564acd9fe7cc99b SHA-256: 11ad4c3432409aa017ee9c2cc875a81d1b5871922c31148faa27154fd89ffffc
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free Robux, directing users to a malicious URL. This URL is flagged as a known malicious redirector, indicating a phishing or scam attempt. The document's content and embedded link strongly suggest a social engineering tactic to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0372

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 http://netcdn.co/app/431946152/beta-this-obby-to-get-free-robux-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
font_00_sfnt_off000014e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E2 20812 bytes
SHA-256: 4fc05964f123812afc425de0afeeaa7e66e19c982f452eb5b4fae2147399d191
font_01_sfnt_off00004231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4231 19288 bytes
SHA-256: 891ddb7a4121ea3d89d42292dde146d81e618e36cf49c0b05ba74d4512613d3c

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