Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e63f0ffb3566870…

MALICIOUS

PDF

35.4 KB Created: 2021-06-28 07:54:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c0cf7355bb593f705f74c3fd0695c627 SHA-1: a94c07ae4a2178e3d3fd763e4de0bfdb8cd6651d SHA-256: 3e63f0ffb3566870a708c8b7c29596e930ed0f137673e753e5c03cdd076b601d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to websites offering 'free generators' or 'hacks' for popular games. The primary link, http://netcdn.co/app/431946152/how-to-hack-robux-on-ipad-game-hack, is identified as a malicious redirector. The document's structure and content strongly suggest it is part of a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-to-hack-robux-on-ipad-game-hack In PDF document text
    • http://mbbs.hr/files/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://mbbs.hr/files/point-prizes-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/do-you-gey-free-robux-with-builders-club_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-hack-com_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-spins-for-coin-master-on-1-19-19_GM406889139.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_off0000303c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303C 23096 bytes
SHA-256: 954db909916afc075a7e4dae8fc7bd9e007d00046898977779b22294af918291
font_01_sfnt_off00006487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6487 19236 bytes
SHA-256: e24dafb54fdd477f29c8cbd630df3de1c75a274f2b728913b5397960a91e4d4d

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