Malicious PDF — malware analysis report

Static analysis result for SHA-256 edeb8958f7fddc5c…

MALICIOUS

PDF

40.1 KB Created: 2021-05-12 14:47:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 53f8bf5a69c3b3688fffb5cf1ee3cf83 SHA-1: aa851f371ec59f5804dae5931dd2d2dc14a01a77 SHA-256: edeb8958f7fddc5c24b106e96b934e7744140cc17e29aa3d6237b3df6288614a
130 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically targeting users with a "free generator / game hack" lure. The embedded URL, https://netcdn.xyz/app/431946152/win-free-robux-game-hack, is known to be associated with malicious redirector infrastructure. The document body also contains similar calls to action, reinforcing the lure. While no scripts were explicitly extracted, the nature of the redirector suggests it likely leads to a payload download or a phishing page.

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/win-free-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
font_00_sfnt_off00003558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3558 25704 bytes
SHA-256: bff31e0d724e2c01b766466d9b0696042b6115a5503f4d26e118bf4f5b1eb65d
font_01_sfnt_off0000711e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x711E 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_02_sfnt_off00007b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2E 18332 bytes
SHA-256: abf0b8ed31f5047ebf3c1463738251345f2a3e8ea43e3f17fb5c5b26bb0b5a7e

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