Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ce861cc5ead57a…

MALICIOUS

PDF

42.0 KB Created: 2021-05-12 12:30:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 84c9d014ea2466cb739cc1403311ca49 SHA-1: 5f40c821c59a3fdb5ebdde9accb017c6082b182b SHA-256: 46ce861cc5ead57ab9e18e8f573ada137ab00e59cfe8e238811dac1f6e23666f
170 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack lure, which impersonates Microsoft and directs users to a malicious URL. This suggests a credential phishing or malware distribution attempt. The embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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/431946152/hacks-to-get-free-robux-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/431946152/hacks-to-get-free-robux-game-hack In 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
font_00_sfnt_off0000366a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x366A 28680 bytes
SHA-256: 22507c7e0daa6211ccfbfde78605fbe8c33da873a575e20650388d6bd67d7c70
font_01_sfnt_off000077f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F2 2880 bytes
SHA-256: 106de1d187d148d03f5c34a802444a7e62d93662ddf359d17cd55770c6c16081
font_02_sfnt_off000081e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E3 18516 bytes
SHA-256: 49067203d4eb86d04ddf999d64ba4750afe8b15cea6fed862c5ee30987f881c1

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