Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce843fa6d697d40…

MALICIOUS

PDF

34.6 KB Created: 2021-07-09 09:12:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2663dde869de9d93bbc96eb94c10ae36 SHA-1: 40f196d062866a536a2333feaeebedf76c95d164 SHA-256: 0ce843fa6d697d401eae4ab2b186ce63d6c4402eda48f54a78b7173d19d4be9c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The primary lure URL is http://netcdn.tw/app/431946152/how-to-get-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to malicious sites, likely for malware distribution or phishing. The ML classifier also flagged this document with high confidence.

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.tw/app/431946152/how-to-get-robux-game-hack In PDF document text
    • http://zagorjeadventureteam.hr/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/roblox-anime-cross-2-hack-money_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/how-to-hack-any-items-free-roblox_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/how-to-not-get-kicked-for-hacking-in-roblox_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/gaming-app-cheats-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/how-to-hack-felines-destiny-for-pawcoins-in-roblox_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-roblox-codes_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/roblox-noob-vs-pro-vs-hacker-vs-glitcher_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_off000030be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BE 22392 bytes
SHA-256: 3f7feb145109c062fbd3e234837a34fa4e3ca7b5a44984e31f2a27b41d9c9593
font_01_sfnt_off0000629c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629C 18820 bytes
SHA-256: a2dfb2a65560055ec751139d067554c48d03732db01303c3495e5b92c6b8973a

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