Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb412479a1037cf…

MALICIOUS

PDF

47.6 KB Created: 2021-05-14 21:41:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 49295a30dcd492191cfe9f0e112e59d5 SHA-1: 50dc78cf8b55a2533fc036e869d97a2686ac8588 SHA-256: aeb412479a1037cf6e7b7de9581e383d2ea73b3d7d928605189714d729355dbd
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a game hack redirect lure, specifically linking to a Roblox generator. The embedded URL, 'https://netcdn.xyz/app/431946152/roblox-cheat-robux-game-hack', is identified as malicious. The document body also contains text and a call-to-action button, reinforcing the lure. While no scripts were explicitly extracted, the nature of the redirect and the lure suggests an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0158

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-cheat-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
stream_003_off00003561.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3561 26064 bytes
SHA-256: 836a934d2133f77f18d0a3073741a504a43dd0c4c3a35f74443343ced793648e
font_01_sfnt_off00007111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7111 12800 bytes
SHA-256: db399d969d9309c9c38cb6e3c43aa83c06d227a5470715de93176d1df1e6747d
font_02_sfnt_off000098ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98ED 18424 bytes
SHA-256: a96f43e65daf9623fa7b9bc259dd656765653644365f0d7d49582fe5e9502473

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