Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b91a562ce76543…

MALICIOUS

PDF

34.4 KB Created: 2021-07-07 01:05:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d30b6c1cb9a2211828398b55b8127bb2 SHA-1: 87d78348dca8faf063f897c65a43b025fc8bb9b9 SHA-256: 91b91a562ce76543f33b324c646f25ec74712d6cedb06111b3e72d4f129d70ab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on "free generator" or "game hack" related content. The primary link, http://netcdn.tw/app/431946152/free-robux-scams-game-hack, is identified as a malicious redirector. The document's structure and embedded URLs suggest a phishing or scam attempt to redirect users to potentially malicious websites.

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-scams-game-hack In PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robuxhub-net_GM431946152.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/every-free-item-since-2021-roblox_GM431946152.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-match_GM431946152.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/good-games-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/marshmello-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://pertanian.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-blogspot_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_off00003207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3207 21676 bytes
SHA-256: 9932507ea4bfd47f96838375ba9f03ed3a036ceaa5228568d0e1e6beee1f185b
font_01_sfnt_off00006194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6194 18976 bytes
SHA-256: 48eef6298bef607355aca425a8072928fe0e0a0bc0ee660e64f251d9c93ff6b2

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