Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae1b6ef7102a415…

MALICIOUS

PDF

28.6 KB Created: 2021-07-20 13:40:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 975efd6208814d23ea6b1ce72fb52627 SHA-1: 36048d25a88be7afaef12e16c19555017f8c9021 SHA-256: eae1b6ef7102a4152905e364d385b044b219b968a777fe9ef9b3f8d8bb7921fa
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that are identified as malicious redirectors, specifically pointing to a lure for a 'free Minecraft Alt Generator' or 'game hack'. The document body and heuristics indicate a clear intent to trick the user into visiting this malicious URL, likely as a first step in a phishing or malware distribution chain. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/free-minecraft-alt-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
font_00_sfnt_off00002018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2018 21752 bytes
SHA-256: 45c38d835f300d74f7bf4f1e600c342e6e218715599729ee0db4ceda8b288ccc
font_01_sfnt_off00004fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC9 17784 bytes
SHA-256: 66ae3cfb6d310f144f42187aaa203441353bb0cc88c1a3915b2f7a14fa3c41b8

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