Malicious PDF — malware analysis report

Static analysis result for SHA-256 66210dc3497d52d2…

MALICIOUS

PDF

39.0 KB Created: 2021-05-10 12:30:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: dd87cfce63fd57d63d455b8104cf32ea SHA-1: 6c2d2f0042ab0414d06ad28b0aad671523d40da3 SHA-256: 66210dc3497d52d23e4bf0e7bd128ab4107a743e9cfa29345373050e1ab273b2
170 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically a lure for game hacks. The document body reinforces this with a call to action and the same URL. The presence of a password protection lure suggests the actual payload is likely encrypted, and the overall workflow points to a downloader or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/how-to-hack-roblox-accounts-2021-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003127.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3127 30160 bytes
SHA-256: 949290bea57f8aa1cb8ac2abf23757391631a3638a1c3e86498071be7cc9d1e8
font_01_sfnt_off000074a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A2 18992 bytes
SHA-256: 91904dcb98687fcf58c7b52e545a9fbf658b3e4d1998331468638ebaf1d03505

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