Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6e358c74011f85…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 05:40:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7ac6f1e8e9fb98dc1256e1cf53d30272 SHA-1: 0990d3107bc758c3da73eb893000da62ac5b6360 SHA-256: cf6e358c74011f85d76c8f0642772703b95f00e485bb98aa04e1ee4dabd46258
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector, disguised as game hacks or free currency generators. The document body and heuristic firings indicate a lure to trick users into clicking these links, which likely serve as a first stage for further malicious activity such as downloading additional payloads or leading to phishing sites. No scripts were extracted from this sample.

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-without-human-verification-game-hack In PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/hacks-para-mad-city-roblox-rock-split_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/free-robux-co_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/hack-mega-matar-gente-roblox_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/how-to-get-free-admin-on-roblox-ios_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/roblox-hacks-2021-for-robux_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/open-coin-master_GM406889139.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://samarpartners.com/new/public/ckfinder/userfiles/files/coin-master-hack-2021-no-human-verification_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_off000033e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E8 22060 bytes
SHA-256: 951e7b70285961d7491c1fbb6d08fda4f5cfcda41d6019404b4299cce86e5368
font_01_sfnt_off000064b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B4 19700 bytes
SHA-256: 8b14ee22fcfa25f62777b70428c8c13e08516b960c8f7fddc92c23ad02cefb37

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