Malicious PDF — malware analysis report

Static analysis result for SHA-256 9046e2f16239217d…

MALICIOUS

PDF

30.9 KB Created: 2021-07-21 12:31:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 59b284b0b1ef09657d30f77028ca8144 SHA-1: f2ebd5645f0b1b5d5e1df1d749c8226663b6d2cc SHA-256: 9046e2f16239217d2cb14f0317a8e37633a8ef61e3596ec6f3572ebcd7f9a476
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a lure related to game hacks and redirects to known malicious infrastructure. The embedded URL 'http://netcdn.tw/app/431946152/free-robux-no-verify-2021-game-hack' is identified as malicious. The document body also contains similar text and links, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0457

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 http://netcdn.tw/app/431946152/free-robux-no-verify-2021-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_off00002181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2181 22932 bytes
SHA-256: daedcd7a4f98a75ec8d66603db331553e82f5a14b7af2246166d84cc0aa5c7eb
font_01_sfnt_off000054ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54EE 19036 bytes
SHA-256: c34bf7a65760171f34da3f69298eb915a2c7f2acfe0422042ed48294a4c22706