Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4751ad40fbcc90…

MALICIOUS

PDF

33.9 KB Created: 2021-06-25 12:32:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 72fb3941ffc11229b0bcd34ac4135292 SHA-1: 8f95ecee6d0a2a8ab36563f04d17d5d1f369ce0e SHA-256: 8d4751ad40fbcc902488fb0ea82defdf95c9a948f059c67b8225cb84c722f082
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically a lure for 'free generator / game hack' content. The document body and numerous extracted URLs reinforce this theme, pointing towards a scam designed to trick users into visiting malicious sites. No scripts were extracted, but the primary attack vector appears to be a deceptive link within the PDF.

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.co/app/431946152/can-i-get-free-robux-please-game-hack In PDF document text
    • https://perpustakaan.itda.ac.id/repository/robux-website_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-free-robux-site-greenlegocats_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-a-free-gravity-coil-in-all-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/follow-people-inyo-roblox-games-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/robux-cheats-com_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/youtube-greenlegocats-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/can-someone-hack-you-if-you-sent-message-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000313d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313D 21316 bytes
SHA-256: 15a926a51559c55cb091b92d30c91d2168680e0cf580ff5429c12803b11628b4
font_01_sfnt_off00005fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA2 19048 bytes
SHA-256: 66ac5490d50dc477b6185567f039d1c4170f6661b1303e2d3cc6c47769be67ca

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