Malicious PDF — malware analysis report

Static analysis result for SHA-256 072463c31df8616c…

MALICIOUS

PDF

36.7 KB Created: 2021-05-20 19:15:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8b1b09683272acc3841f7f94ebe4e7e7 SHA-1: 0c3faec1dfc0c8a838f1076991aeb6f10e717b34 SHA-256: 072463c31df8616c80e72bf22dedd03750f52da846f9851bddfa9f60ea38b018
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it links to a malicious redirector disguised as a 'free generator / game hack'. The document body also contains a call-to-action phrase and a URL pointing to this malicious infrastructure. No scripts were extracted, but the overall pattern suggests a phishing lure for malware or unwanted software.

Machine Learning

  • Nyx PDF Classifier clean score 0.0739

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/479516143/minecraft-world-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_off00003057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3057 29536 bytes
SHA-256: a18847d7a4b79e18aa8c0d947a47ced97173a632835a08adcf8a3f9e3e37a6a6
font_01_sfnt_off00006dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCB 18488 bytes
SHA-256: 53d97953320c4a27ca75ab54c15cccabcbe94f1a7eef6df1be3b25df4f56750c

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