Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ab623d062968f2…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 23:26:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d93d0c2c85c2df4c2631de15ff9af1bb SHA-1: 9c7549a6789ba227d20f21db3531bd5776447dc5 SHA-256: 07ab623d062968f21bbef0c583743bce5276dd79db0aa4d597f1a402339d43e5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of free game hacks and Robux. The primary link, http://netcdn.tw/app/431946152/how-to-get-free-robux-game-hack, is designed to lead users to potentially harmful content. The document's structure and embedded URLs suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

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.tw/app/431946152/how-to-get-free-robux-game-hack In PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-no-human-verification-2021-or-survey-no-download_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/roblox-anti-hack-saving_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/cheats-for-the-tales-of-the-ranges-cape-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/roblox-saber-simulator-hack-script_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/hack-roblox-com-2021_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-hack-roblox-with-dll-injector_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/hack-alle-pets-duplizieren-ninja-legends-roblox_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/robux-hack-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/cookie-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-roblox-accounts-with-no-pin_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/minecraft-bedrock-hacks_GM479516143.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_off00002f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F67 21896 bytes
SHA-256: cb0e13231fd19d554b6f163d8cf85e374b6b8be1e7f0b0990373c621290055a2
font_01_sfnt_off00005f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F84 18984 bytes
SHA-256: b02f235e187ca63825268846ce24859b9c73d6f06522f0e44481555b58ecada8

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