Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc9b12084f6ac47…

MALICIOUS

PDF

35.3 KB Created: 2021-06-19 22:28:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 63363d9c127806686add48d4aa0812ea SHA-1: c7b05aebdcbfc08c6ac5ade3851b70cc43d53c38 SHA-256: 5fc9b12084f6ac4729c3789345ac64dc6574bd524c11f132681e46134ba4496a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this, indicating a phishing attempt to trick users into visiting a malicious site. No scripts were extracted, but the primary attack vector is the embedded malicious link.

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/roxpoes-roblox-exploits-and-hacks-game-hack In PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-to-buy-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/roblox-holy-sword-cheats_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/roblox-glames-with-gliders-free_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/rocashcom-earn-free-robux-by-watching-videos-and-completing-sur_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 3

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_off000032b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B6 22288 bytes
SHA-256: 470ef3344f8310ee6ce9d10683fd2d9d62a9928c0366bce7c4ae93a3162bd63d
font_01_sfnt_off0000643f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643F 19232 bytes
SHA-256: cf439e704a7cdedece1b9d5859d080a7fde97a833ef8d867f5cb3866e3a00565

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