Malicious PDF — malware analysis report

Static analysis result for SHA-256 084dbf7f0c87be09…

MALICIOUS

PDF

36.6 KB Created: 2021-05-22 14:44:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 566f42b865e52a94083e21d1f5c28b9b SHA-1: d6661f9af6ed58da1fbd394fbbc0e193e13f6df7 SHA-256: 084dbf7f0c87be09aeaa6ff45ed2b6b6a2eca38b5865cef33c24e95a081aa5c7
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 directs users to 'https://netcdn.xyz/app/479516143/how-to-install-minecraft-for-free-game-hack', which is likely a gateway to a second-stage payload. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious document designed for user-driven download of further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/how-to-install-minecraft-for-free-game-hack In PDF document text
    • http://www.occquimica.com.br/images/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://www.occquimica.com.br/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.occquimica.com.br/images/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://www.occquimica.com.br/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://www.occquimica.com.br/images/coin-master-twitter_GM406889139.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
stream_002_off00003447.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3447 25992 bytes
SHA-256: be9dce3e343f223dcfd6d433dd7cbbfc51ce11a810ac898e0a970eafa7df6494
font_01_sfnt_off00006ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE4 17948 bytes
SHA-256: 5e3ba7e4cd3ca4e9461728952bafe8ac7745d23e1bc3d1385ef5be4278fd35be

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