Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c0ff5c8a4fb566…

MALICIOUS

PDF

44.1 KB Created: 2021-05-02 18:15:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 339a246956785c6eea0ca4a6f1018327 SHA-1: 92e888ff9df65eb1d4fefbec60af7bc58f34d85d SHA-256: 08c0ff5c8a4fb566cf934b9d4c283345dc2b3fb57e31f0202fa43c227144d02f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users with promises of free game hacks or Robux. The embedded URL, https://netcdn.xyz/app/431946152/free-robux-hacls-no-download-survey-or-verification-game-hack, is directly associated with this malicious redirection. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest a social engineering attack to drive traffic to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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/free-robux-hacls-no-download-survey-or-verification-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-a-free-skin-noob-roblox-2021.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-put-cheats-into-big-paintball-on-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hacker-vs-noob-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-close-for-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-roblox-items-on-catalog.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/cheats-for-meep-city-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-free-shirts-and-pants-2021.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-how-to-hack-rpg-games.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-roblox-with-cheat-engine-prison-life.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/bc-free-roblox-android.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
font_00_sfnt_off000041bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41BC 25772 bytes
SHA-256: f70b3d5c097e0afea76cd9a0682e9e3af1d7390722e284073637dc704c87ca27
font_01_sfnt_off00007d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D29 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off000086ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86EA 19472 bytes
SHA-256: f635f590a6e4425389e834fe5cee10df920621d740906a5afc1686a0059b9899