Malicious PDF — malware analysis report

Static analysis result for SHA-256 014260d0acd23173…

MALICIOUS

PDF

28.3 KB Created: 2021-06-17 20:11:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 54cbca136f5f7ebc133318abda847435 SHA-1: 4bf2749b1542dbbdb34ba4d02be3df4b15005a19 SHA-256: 014260d0acd231731dfea11548820c8254ae92ad43588033b3369ffa25bdbe6c
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating it links to a malicious redirector disguised as a game hack generator. The document body reinforces this by containing phrases like 'How Do U Get Free Robux' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', along with the malicious URL. While no scripts were extracted, the presence of a malicious redirector and the lure suggest an attempt to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0330

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/how-do-u-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_off0000197a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197A 22176 bytes
SHA-256: 9494268bf4ccacbb3dfe86407d563399e6ca6fc2315dfbf34355df91e697281d
font_01_sfnt_off00004aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA9 19152 bytes
SHA-256: e62fd154b22e8a237d0c5fd5aca87f51fb4a817c5318a30dd1d6bc44dc361d61

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