Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ff2b47f4b15b9a…

MALICIOUS

PDF

29.0 KB Created: 2021-07-19 09:12:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 78a46aab588828737b82cc9220c0652a SHA-1: 992a194840ca5fa41724dec9a2e1b2d59df8f5df SHA-256: d4ff2b47f4b15b9a2aa494e665f597258c40ec49bf3ca23492627251b8406f29
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/479516143/minecraft-free-trial-game-hack. The document body and heuristics indicate a lure for game-related cheats or generators, suggesting a phishing or scam attempt. The presence of embedded URLs and the nature of the lure point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9359

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-free-trial-game-hack In PDF document text
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn 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_off000022e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22E4 21468 bytes
SHA-256: b4fd3e69933ebdcb57edb6fefaa1a409493c4901e66cda3603964eb55d5ae50d
font_01_sfnt_off000051af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51AF 17644 bytes
SHA-256: eaa999d9fcd0e41c3411a6787ff304b3b9a642a81f97c4ae06503d53e3265cce

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