Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4329e899edfebb…

MALICIOUS

PDF

34.2 KB Created: 2021-06-25 22:20:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d148bf80bae5b032f28bcfd4c1eb1a27 SHA-1: 9ca88b49891fa9d8abdafc25bc7655a46118edf8 SHA-256: ec4329e899edfebb9fa1da5f92024a8b4a0bb3540ef59f54c8a8d1a2c84076f1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating malicious redirector links, specifically luring users with 'free game hack' content. The document body and embedded URLs point to a primary redirector at http://netcdn.co/app/431946152/free-gamepasses-on-roblox-game-hack, which likely serves as a gateway to further malicious content or downloads. No scripts were extracted, but the overall pattern suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/free-gamepasses-on-roblox-game-hack In PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/pokemon-go-free-promo-codes_GM1094591345.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/impact-hack-client-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/venom-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-ninja-legends-groups-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-roblox-to-get-free-robux_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_off0000302c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302C 21856 bytes
SHA-256: 7984f30912dcf2b8de924d9ed2b1ceaaee155f5f4837265d5e2f22a2cab84671
font_01_sfnt_off0000607b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607B 19088 bytes
SHA-256: e60f344e9ded73da855114e2eda4b1ba031e276db814b82eda19a38e0d3bc6f4

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