Malicious PDF — malware analysis report

Static analysis result for SHA-256 92373de44ac56178…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 03:21:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 58169cf06b68ab8cc45bca49e3d0f17a SHA-1: c8887d61a034fb61ac5029ccabc192eac5bf16ec SHA-256: 92373de44ac561780c251c607d0b5d96f167547b7fef2423f808dfbeca0bebba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded URLs confirms a redirection-based attack. No scripts were extracted, but the document's primary function appears to be luring users to potentially malicious download sites.

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/joueur-de-hacker-sur-daycare-story-roblox-game-hack In PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/conquerors-hack-roblox_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/rbxnow-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-64-rom-hack_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/tiktok-free-views_GM835599320.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-robux-hack-without-download_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-robux-website_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_off00003127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3127 22348 bytes
SHA-256: ea3f5795c52728fffc53cc639857bd463f629bd0a34de261ebc56aabdcfcb7bc
font_01_sfnt_off000062d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D7 19228 bytes
SHA-256: 2d95f46d39554f0f36014dab03daa3f6a8eb7fe0f6bb1f06061458a6370c3c42

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