Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f684be381be79bf…

MALICIOUS

PDF

35.4 KB Created: 2021-06-23 08:13:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: be68dc96de1bd9438187560993d4c412 SHA-1: 0a687c387a8ad21a9211befc149bd93189564138 SHA-256: 8f684be381be79bfec91dd1c69390e43704776c3a035ec55e5cc54636c41eb54
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, directing users to a URL that is likely malicious. The document body also contains this URL, reinforcing the lure. While no scripts were extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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/how-to-get-free-animations-on-roblox-2021-game-hack In PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-com-roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-roblox-accounts-discord-bot_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-free-items-promo-codes_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/booga-booga-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/hack-roblox-system48-free_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-adopt-and-raise-a-cute-kid-money-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/account-hacker-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-place-copy-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3219 22220 bytes
SHA-256: 49957702eec46570d3b50360b96aaa20333b3af4365c7d357f8cd41997e5dfa6
font_01_sfnt_off00006374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6374 19700 bytes
SHA-256: a45760150a939c332c914052fd2260acceb9d5bea4f37167b8f2cc85bdf360c9

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