Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f960af8039cc876…

MALICIOUS

PDF

38.4 KB Created: 2021-05-21 06:22:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4ec799d5250b0960f89b4190f759b7f6 SHA-1: 7853db2339dc96e965af113c606e5458242e3962 SHA-256: 4f960af8039cc8763488b3c06b28e9e49922dcfb30e53b115ac7c4c73e66e1d8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "free generators" and "game hacks" for popular games. The primary lure URL is https://netcdn.xyz/app/479516143/get-free-minecraft-account-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to trick users into navigating to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7268

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/get-free-minecraft-account-game-hack In PDF document text
    • http://axiapublishers.com/images/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33DA 24712 bytes
SHA-256: d5ef7b1e859d1e96bda6a0dee05f97dca8b61834e20146429564ba2aa7879c0e
font_01_sfnt_off00006c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C02 2856 bytes
SHA-256: 8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44
font_02_sfnt_off000075d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D8 17848 bytes
SHA-256: 6ca58bbc5c252d5e4a1aca958c959d63db43c13a52b94ea2f1ea4654af3c8c31

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