Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec57ac3a0f51c6c2…

MALICIOUS

PDF

35.6 KB Created: 2021-05-21 13:47:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e80f160760fc65805f09f54e268f7042 SHA-1: 824a8ef3cde081d828c87769c5b8113922bb164c SHA-256: ec57ac3a0f51c6c2912b3107831d52c39f9c212ea39815c2dcd9e30ea2bae3af
170 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Roblox Free Accessories' and includes a critical heuristic firing for a malicious redirector link. This link, 'https://netcdn.xyz/app/431946152/roblox-free-accessories-game-hack', is associated with a game hack generator, a common social engineering tactic. Additionally, a heuristic for an MFA lure suggests the potential for credential harvesting or session token theft. While no scripts were directly extracted, the PDF structure and malicious link indicate a likely attack pattern involving redirection to a phishing or exploit site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/roblox-free-accessories-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_off00002d85.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D85 26872 bytes
SHA-256: bb37aaed03b95c9f8183384bc0ff469bbd1c41d1a9dae3cca04b8ba7daa4cc1f
font_01_sfnt_off00006b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0C 18068 bytes
SHA-256: 631d65c1f3e2a0dc4ab1c15de4169549fc1962130d484212c2774f26f0b2a84d

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