Malicious PDF — malware analysis report

Static analysis result for SHA-256 55a49eba97377be2…

MALICIOUS

PDF

35.0 KB Created: 2021-06-19 11:15:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b1c82661f7719c975c9493768968c5ff SHA-1: 3395734cc97c53a36442da9fb702069ee6fa0008 SHA-256: 55a49eba97377be273ff16fff2f266aa0d6d60b181913c80db199fb89c3e6f46
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 advertising 'free Robux' and game hacks. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lure users to malicious sites. The presence of embedded URLs and the nature of the lures indicate a likely attempt to deliver a second-stage payload or lead the user to a credential harvesting page.

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/free-robux-gift-card-codes-2021-game-hack In PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/coin-master-link_GM406889139.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/cool-kids-hacks-download-roblox_GM431946152.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/coin-master-free_GM406889139.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/free-new-indominios-roblox-buble-sim_GM431946152.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/roblox-tracker_GM431946152.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • https://nedowningbrochure.co.uk/admin/ckfinder/userfiles/files/free-spins-on-coin-master-iphone_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_off00002fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE0 22452 bytes
SHA-256: 335c2b10fbf977d5ab6913af21dbabe14264ed100b4193d08a56d143d189ad5e
font_01_sfnt_off000061f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F8 19516 bytes
SHA-256: 29e75f30c5e86761bb92b3b01e6b6c9178fe3a430d56702e6e4d31a38e0984ae

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