Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca4667584c6651b…

MALICIOUS

PDF

34.6 KB Created: 2021-06-19 08:55:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d98dbfeb04c39cc73232f21487f911ac SHA-1: 9804bbc18c43c3072ccaed411d4310233b610739 SHA-256: aca4667584c6651befdfa18c789517ed1dd7f7565cc375e51a8a6a55c4f611d3
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and cheats to trick users into clicking malicious links. It contains numerous links to redirectors and SEO-optimized PDF files, suggesting a campaign to drive traffic to potentially malicious sites. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content.

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/theme-park-tycoon-2-roblox-cheats-game-hack In PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-instantly-no-survey_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/robux-free-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/dll-files-hack-for-roblox-vehicle-simulator-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-generator-2021-no-survey_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_off00002ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE7 22404 bytes
SHA-256: e8050cce5a59d9f3eb92a252efcc58d788793d7e40c789ac7bd04d66b7a0624f
font_01_sfnt_off0000605d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605D 19644 bytes
SHA-256: b94af3dde9d808cab477bbc6bbf8268ba8368484c42067dfa3b380da26728475

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