Malicious PDF — malware analysis report

Static analysis result for SHA-256 276af8f1d70174c8…

MALICIOUS

PDF

36.8 KB Created: 2021-07-04 21:29:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4ecefd329bd681ab86e3fe37849f876b SHA-1: 0f447fbdca72652dbfa8a810d653069941bdc2d0 SHA-256: 276af8f1d70174c84fe15e7371b95397e9c91ed82a834ad1b9707068182cae56
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'Coin Master Hack Download 2021'. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to lure users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack.

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/406889139/coin-master-hack-download-2021-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-hack-a-roblox-account-with-hashes_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-cheat-in-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-hacked-prehacks_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/install-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/all-roblox-games-that-actually-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-black-and-white-roblox-trophy_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-table-cheat-engine_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/boku-no-roblox-hack-script-auto-farm_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hack-fly-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-boombox-roblox-item_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-speed-hack-jailbreak_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-paintball-cheat-codes_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hack-apps-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/synapse-x-roblox-free-download-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/is-there-a-way-to-get-minecraft-for-free_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_off0000376e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x376E 23012 bytes
SHA-256: 17c9a5cfefc5f2c4d89200bb90c43732f34b1245ff6ceda1e7114f4b92a0bb14
font_01_sfnt_off00006b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B13 18988 bytes
SHA-256: 24c61ec5dda380d335f70cf248a1dbd8858f35ecf964e4cb835eae0821bc023c

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