Malicious PDF — malware analysis report

Static analysis result for SHA-256 422b5ddc4c3bc2ca…

MALICIOUS

PDF

36.2 KB Created: 2021-05-14 04:31:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f5b041c6f46aa59b49a8b450610eaf84 SHA-1: 9c76158a2fb5381c297ce5a3c06f41dc97b22cb9 SHA-256: 422b5ddc4c3bc2ca08fbbe57d132f9d0c30a8a5f2583168a75c8b7323c360861
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase designed to trick users into visiting a URL associated with game hacking or free currency generators. This URL redirects to known malicious infrastructure, indicating a phishing or scam attempt. No scripts were extracted, but the embedded links and lure text strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0604

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-robux-hacker-us-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_003_off00003291.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3291 25040 bytes
SHA-256: 74673f35c317cdea1399df961f2fb110e2eae7e02350740b54836fe4bc666a66
font_01_sfnt_off00006b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B08 18600 bytes
SHA-256: be32b0f906764c1f2317decc7ac5a24a5975e1ace61028a3a9703984df87bb8b

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