Malicious PDF — malware analysis report

Static analysis result for SHA-256 02cbdba35a076db7…

MALICIOUS

PDF

35.1 KB Created: 2021-06-26 21:46:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7a0e6f1e81b65ec28b1d8d9f0eb29e33 SHA-1: 17856776ed7a3c2de17ad13bb0bd1c0d6ce61af0 SHA-256: 02cbdba35a076db73dee2ae7ce519bd27edc00e8dd584cb65f4ad3d21f347c0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lure users to click on what appears to be a 'game hack' generator. These links redirect to malicious infrastructure, specifically http://netcdn.co/app/431946152/roblox-hack-robux-2021-pc-no-human-verification-game-hack, which is flagged as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting potentially harmful sites.

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/roblox-hack-robux-2021-pc-no-human-verification-game-hack In PDF document text
    • https://www.advancissurgical.com/uploads/files/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/pirates-wrath-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/top-10-type-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-cheat-indetectable_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/earn-free-points-for-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-money-in-roblox-adopt-me-2021_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_off000030e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E6 21940 bytes
SHA-256: 341a89486b89f2edd528fe33b8264848823f7b060744cb0b3232e27d71e6f44f
font_01_sfnt_off00006152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6152 19968 bytes
SHA-256: dfd40d650fc477d8c5a8acd22a8060331a8c4b456e29854962da6ad605e7b34c

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