Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d59fe00ea7e1bb9…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 07:02:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 70e5d3142aee12fc9c336aefcab30873 SHA-1: 5203c5301b5c8f7925b17c6754a474755988e6d6 SHA-256: 3d59fe00ea7e1bb93199c6e7828692e874986d0aa49c88469c2de47a6e6fc228
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and sites offering game hacks and virtual currency. These links are designed to lure users into downloading further malicious content, likely through a chain of redirects. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a download button lure supports a phishing or social engineering attack pattern.

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/coinmaster-game-hack In PDF document text
    • http://pspmrsmbpulau.com/opac/repository/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/robux-survey_GM431946152.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/roblox-jailbreak-hack-noclip-zip-file_GM431946152.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/how-to-get-free-robux-2021-october_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/how-to-get-202100-robux-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/free-girl-roblox_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/how-import-audio-free-roblox_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/roblox-bc-free-2021_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/best-way-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/robux-for-offers_GM431946152.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/roblox-hacks-20217_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/free-robux-2021-no-human-verification_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_off00003026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3026 22940 bytes
SHA-256: dbc11c5ffaea26a2e15c0585e1630ab827320b157d3a60459c6019d2002bf248
font_01_sfnt_off000063a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 18092 bytes
SHA-256: aeec47090e2d397d52e6994ac52fcd26f4fdd646fe6594f845e9ca54af877ae9

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