Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54302750d86477e…

MALICIOUS

PDF

28.5 KB Created: 2021-07-21 00:31:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d5f5e68ee7c0458e9e7def238aa02ea6 SHA-1: 08725e862985f9d814fb0b50b62c419f0e667a62 SHA-256: f54302750d86477e96b10514271505c1df6cd8c140890cdbcec624001de5a3d9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to a known malicious URL. The document body also contains a call-to-action phrase, reinforcing the phishing attempt. The embedded URL is the primary indicator of compromise, likely leading to a further stage of infection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0329

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/479516143/minecraft-java-free-download-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_off00001f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4B 20984 bytes
SHA-256: 987500f0e63110349b85550f093eb0198c268935968efed8f7234a7e46b0c859
font_01_sfnt_off00004cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC3 18572 bytes
SHA-256: 84d994c9ca9b5ef406cb0cbd16402c282b50396e13120ada9f75f5d4c4d42292