Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be919c895115767…

MALICIOUS

PDF

39.8 KB Created: 2021-05-21 18:39:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d26c06a864dd78f8d23b4f6d1e2eb9ed SHA-1: c7d765a41c542ce85972d2edd6d113fcc4157fe7 SHA-256: 6be919c895115767b6e811420da264fa8ecb1f4f4df18ade0db4766a86887829
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 like Roblox. The ML classifier also flagged this PDF as malicious. The embedded links likely serve as a lure to download further malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/431946152/roblox-avatar-editor-free-game-hack In PDF document text
    • http://www.eaapiaria.es/images/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://www.eaapiaria.es/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.eaapiaria.es/images/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.eaapiaria.es/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://www.eaapiaria.es/images/pubg-300-uc-trick_GM1330123889.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_off00002e91.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E91 34888 bytes
SHA-256: 38f1034ffb11b6874e63764feb489e6c16de5cf6ba88ab7de4be94ac81180dd4
font_01_sfnt_off0000793a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x793A 18688 bytes
SHA-256: df5bcc24373e296ec4817c651a2102fa03399b65c3de23d7ceb8af082f98641c

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