Malicious PDF — malware analysis report

Static analysis result for SHA-256 14447fd759210cb6…

MALICIOUS

PDF

35.5 KB Created: 2021-05-21 11:10:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7592ee780cad4fc912afa7c0b5d1cc77 SHA-1: 4670e6c56d0cb0a1762092606fd9c2c53900fe50 SHA-256: 14447fd759210cb6033d9dc17f4b00a7a45e5b20ea9c58c2ae710cca018e3bbe
130 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically advertising a 'free generator / game hack' for Roblox. The document body text and embedded artifacts further reinforce this lure. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-back-accessories-roblox-game-hack, which is likely used to deliver a secondary payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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-back-accessories-roblox-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
stream_002_off00002b77.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B77 26956 bytes
SHA-256: 2430f281629ffb5cfebed0ccf4bc7f44f983275574b06ff2c60eb77b238127b0
font_01_sfnt_off0000694d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694D 18468 bytes
SHA-256: ed1381c69922638ba3deea165f9c97413a9991048cfb55badf94070f5a9fa8be

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