Malicious PDF — malware analysis report

Static analysis result for SHA-256 85dcf9c0faecd593…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 02:03:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7c8a1fb9ea507b73594e29b5cf02d0a2 SHA-1: e7641eb87cd6ea447087d23c8422837fdc3a95ff SHA-256: 85dcf9c0faecd593b1f06ac33ebde4354d4e5471d4ab1a5946cfb2c8a9b4b97d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/free-robux-accounts-game-hack. The document body and embedded links are designed to lure users into clicking these links by promising free game-related items. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the primary attack vector appears to be directing users to malicious external content.

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/431946152/free-robux-accounts-game-hack In PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/hack-granny-roblox_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/roblox-cp_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/pokemon-go-free-codes-2021_GM1094591345.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.com/admin/ckfinder/userfiles/files/roblox-hack-download-pc_GM431946152.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_off00003221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3221 21988 bytes
SHA-256: 37f63f265c91111e0fea87cd13a54e6b067da7a2784549f609d85eaf3f3229cd
font_01_sfnt_off000062f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F2 18820 bytes
SHA-256: 9247447a3c3765c463ad34d06656dabe45291e7d100ded84caf3f858f3985503

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