Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3fbdc4f87c4195…

MALICIOUS

PDF

35.9 KB Created: 2021-07-09 14:27:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ee72c3be07fab277398bbf996bdf32b4 SHA-1: 08ed840cb1dec1060f368b1514a97600402f7afb SHA-256: bb3fbdc4f87c4195f6f10a1c334d25e2f908b9c3ef38645cf81c30df9f36ffbd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The primary lure, 'free coin master spins link download game hack', directs users to http://netcdn.tw/app/406889139/free-coin-master-spins-link-download-game-hack, which is associated with known malicious infrastructure. The document's content and numerous related URLs suggest a phishing or scam attempt 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.tw/app/406889139/free-coin-master-spins-link-download-game-hack In PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/roblox-noclip-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/guy-goes-to-jail-for-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/roblox-mad-city-hack-money-francais_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/add-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/roblox-is-being-hacked-chaos-washers_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/1-million-free-robux-landon_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/0-0-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/how-to-hack-people-for-real-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/free-robux-with-inspect_GM431946152.pdfIn PDF document text
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/roblox-level-7-hack_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_off00003481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3481 22856 bytes
SHA-256: 23476cbd4ca6d98a90e8a880fc7efb8b0aeea52611fce893e8f6da3962e492f9
font_01_sfnt_off000067c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C7 18924 bytes
SHA-256: 27c8c61d44c060da30f6c9600d603766ffcc18b4584fd5ddfdc22e1ec1594314

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