Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d347b57a8deddfc…

MALICIOUS

PDF

40.2 KB Created: 2021-05-17 05:01:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b2429393585ccd088cb6358e40302de7 SHA-1: 9f964963ae2707682733e0a689deb79ad1696d49 SHA-256: 3d347b57a8deddfcec3e0d05c7b04d51f7811bfd1b6139d79cbbaafa1ac1750b
130 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free Roblox hack'. The document body also contains similar lures and a call-to-action button. The primary function appears to be directing users to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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-roblox-hack-us-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_off00003630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3630 25164 bytes
SHA-256: 33d7c37331256bf33c6456075f30860426c53202b749ac363360af6ca9dad365
font_01_sfnt_off000070b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B7 3048 bytes
SHA-256: 75fc2757431e7417d49a986f80d90451f4513b3517b9e6ce22a5eec72e231d5b
font_02_sfnt_off00007b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B18 18532 bytes
SHA-256: 0d34e375d8902d3efa285fd24fab142d003833d4205c7dc9a730d4d831678389

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