Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00ae7146fa33573…

MALICIOUS

PDF

37.3 KB Created: 2021-06-24 22:24:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2219913ea464a22273670dbc6edac3e1 SHA-1: 0aa0874ef1b9098e1e25fc62bed6b0d32037ef8a SHA-256: a00ae7146fa33573f2c8a3794794dececf2d3d6253ba2104fa218378affd76aa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and generators. The embedded URLs are designed to lead users to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector workflow, likely intended to deliver a second-stage payload.

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/heroes-online-free-roblox-game-hack In PDF document text
    • http://opac.salatiga.go.id/slims7//repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-jaiilbreak-cheats_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-anything-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-wallpaper_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/catalog-roblox-free-items_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-do-the-walk-through-walls-hack-in-roblox_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_off00003baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BAF 22520 bytes
SHA-256: c8eb6a49fdacb4c6393a48f5630a784f894072c09ba3413570a0cc373cadb3cb
font_01_sfnt_off00006e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E01 18768 bytes
SHA-256: 82a9952317db5e2003fa2ad46e56bc4d5f01493ba20a2365b04d0aab752dd09a

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