Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3182c8d96e4b4e1…

MALICIOUS

PDF

42.1 KB Created: 2021-05-24 05:13:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 21209de07b90d2d133202b0db7d8c83e SHA-1: 0bda72156bbd5c590d432374a245a8a68ffc2c04 SHA-256: d3182c8d96e4b4e197c4299d8d68f0d5fdc6c51afeca01ecc4d59b7836732089
130 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically targeting users with a lure related to 'Roblox Promo Codes Free Robux'. The embedded URL leads to known malicious infrastructure. The document body also contains a call-to-action phrase, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0124

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/431946152/roblox-promo-codes-free-robux-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002e29.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E29 27920 bytes
SHA-256: 14b6f066ad45352ccda558aa61becd909ae20020a7467dbf708328d9b7b12cff
font_01_sfnt_off00006dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAB 3048 bytes
SHA-256: 8e3177387e38bcdbf85cf0fd6361c7e846c00241f9081b6a8d6732b2c7387a93
font_02_sfnt_off00007820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7820 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off00008231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8231 18676 bytes
SHA-256: 3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f

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