Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd7f2045eccf584…

MALICIOUS

PDF

25.2 KB Created: 2021-05-16 15:22:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fbbb4cd31544c406202c9c7eecba1519 SHA-1: 6b49ef43603588cd1823836ae291027b0d4a9cbd SHA-256: afd7f2045eccf584711d9e6e58f780e18c0daa6659fcd3664962d528c70f5e2b
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a download button, which redirects to a known malicious domain. This lure is intended to trick users into visiting a site that likely hosts further malicious content or exploits. The document body and heuristics indicate a scam or phishing attempt related to game generators.

Machine Learning

  • Nyx PDF Classifier clean score 0.0360

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/oprewards-points-generator-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_001_off0000108f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x108F 22052 bytes
SHA-256: 1d192796603860e39a5ac962fab3e41ab43d277ff1b4d9c6b995b7b739c135c6
font_01_sfnt_off000041bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41BB 18048 bytes
SHA-256: 73507d95f7fce559bf3789cd1ccf0079744f7f1add1175baa0f279c2b7cd5a45

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