Malicious PDF — malware analysis report

Static analysis result for SHA-256 846d0be09267c31c…

MALICIOUS

PDF

34.0 KB Created: 2021-06-20 09:29:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 597fe359bad7d4dfe26ef39443d7bf46 SHA-1: d74a275aae57b90a1f3f218bfc1b5e9cf5d3f890 SHA-256: 846d0be09267c31c7ab0fea013a811c5a53025b8fac1cb5869a7a4f0cd9f4011
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a lure for free game currency and hacks, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it links to known malicious redirector infrastructure. The embedded URL http://netcdn.co/app/431946152/robufree-club-free-robux-game-hack is the primary indicator of malicious intent, likely leading to a further download or phishing page.

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/robufree-club-free-robux-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/comment-hack-roblox-en-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coinmaster-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-games-that-are-real_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-t-oget-ant-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-967k_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/boku-no-roblox-all-legendary-quirks-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-get-free-gear_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-116-apk-download_GM479516143.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_off00002fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBF 21952 bytes
SHA-256: 306a2bec0ffd865d8142c28592eff0ad60bd2b52b1b9ca0c3d34b0b7df49ad12
font_01_sfnt_off0000607d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607D 18788 bytes
SHA-256: 0bf7fe162dc2b82a8abc6ee84ef1d26234b6e8ff080543af04db104c10038f5d

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