Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4efc49721762e3…

MALICIOUS

PDF

35.7 KB Created: 2021-06-27 05:14:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d255ccacb9086ee88c208d74f9c7908f SHA-1: c53147cc9930953949d3900b99feabb35ec28865 SHA-256: de4efc49721762e38756ad68c1c6dadadcd15ee569785f23c164d45b41bcd50c
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors and IP addresses, masquerading as generators for in-game currency and hacks for popular games like Roblox. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks. The document body and embedded URLs strongly suggest a phishing or scam attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-get-robux-for-free-in-roblox-2021-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-way-to-get-p-in-plaza-game-on-roblox_GM431946152.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-catalog-admin-free_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-game-code_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-best-hack-injectors_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-a-free-knive-in-roblox-cbro_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-hack-no-human-verification-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-roblox-mad-city_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/whats-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/robux-javascrip-hack_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-roblox-gift-card-codes-2021-december_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-ipad-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-money-on-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-executor-download-virus-free-download_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_off00003344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3344 22480 bytes
SHA-256: 1515e2a6eb722c57f1372e9d03d39b79c98960444b8ae2c618dd989891a0835d
font_01_sfnt_off0000650f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650F 19460 bytes
SHA-256: e532859bd153c3058a67c6838cb59b3149543e20c0b97c2c1e8e90665a08d9f4

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