Malicious PDF — malware analysis report

Static analysis result for SHA-256 111a9346abd757a5…

MALICIOUS

PDF

37.3 KB Created: 2021-05-14 06:05:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2d565bfb8d6e97e783a1c66d678f17ee SHA-1: 1c20eaafbbea3d2be73f3d43d05de29d996acb74 SHA-256: 111a9346abd757a5235f205fa769c5df25b081740c8adef9eb5494f38f40f356
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a redirector lure, specifically mentioning a 'free generator / game hack' for Robux. The embedded URL leads to a known malicious redirector infrastructure. The document body also contains similar text and the malicious URL, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/how-to-get-free-robux-without-verification-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000036a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36A3 24220 bytes
SHA-256: 51c47b79addf74200657e3e2f45f65f1fcc5e6ca0fdcaf3726302c2db8d78de0
font_01_sfnt_off00006dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD4 19128 bytes
SHA-256: fe2fba94a2d86c9c71a87afecb14f9f9cb432365285dbf62d8027955010708b1