Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9f4c99ff908a5a…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 15:49:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7dc2ec846f8e19457f8e3988bd8d9d45 SHA-1: 6d752e9f91adc96891bb861a1623a0ff21ab34d3 SHA-256: 1e9f4c99ff908a5a0f91f50ce1f7fe8fcd9f4adfbf2cf78394c8b77dddf7e2d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is http://netcdn.tw/app/479516143/minecraft-gun-mod-download-free-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into downloading potentially unwanted or malicious software.

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/479516143/minecraft-gun-mod-download-free-game-hack In PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/best-roblox-free-hacks-topek_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/when-nerd-sees-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-demon_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/get-robux-com_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/business-simulator-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-get-free-robux-in-roblox-pc_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/robux-hack-no-download-no-survey-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_off000030e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E7 21360 bytes
SHA-256: 6b6e51849b0afe43c9eba0fda6cfa95a04269c843a61a6a8203f37ffe95e7e69
font_01_sfnt_off00005f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F80 18720 bytes
SHA-256: c40eb1edf819727d779fcdd46a1a495425ff69d655ae06a101e79a8dd4ff089a

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