Malicious PDF — malware analysis report

Static analysis result for SHA-256 c40e6e95c0def1fe…

MALICIOUS

PDF

36.4 KB Created: 2021-05-21 18:40:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8e0ba71680455fa5f3f83d002400204f SHA-1: 39a3b1c49d8d148263152d312fc88edbc8deee27 SHA-256: c40e6e95c0def1fe06b5e5e9b0fc5de8289e24cd9e1ffe8487c464081fd554f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generators' for games like Roblox. The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-to-get-more-robux-for-free-game-hack. The document body also contains embedded links to other potentially malicious PDF files hosted on fabbrotorino.eu, suggesting a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/how-to-get-more-robux-for-free-game-hack In PDF document text
    • http://www.fabbrotorino.eu/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-heaven-free-spins_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_off0000306d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x306D 25724 bytes
SHA-256: 6ea32cd7acb457f46277d3aaecf0a4afd80b13542694d5112bcaacde1b20a412
font_01_sfnt_off00006c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7F 18480 bytes
SHA-256: 444f48c68388f928a3d871611d0873030738946ead4f6691d00c6869f71b1127

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