Malicious PDF — malware analysis report

Static analysis result for SHA-256 05961e103aca4d92…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 16:02:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f35df012c17321362de6c175a988e161 SHA-1: 1c6c72c42aa4fdcf2b5d088e79099c057325b079 SHA-256: 05961e103aca4d923857a6bbb5d14ba71bd7fb3cbe21b390798faccfaab13feb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack'. The embedded URL 'http://netcdn.tw/app/431946152/free-robux-exe-game-hack' is identified as malicious infrastructure. The document body also contains this URL and other links related to game hacks and free currency, reinforcing the lure. The ML classifier also flagged this PDF 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/free-robux-exe-game-hack In PDF document text
    • https://cfla.gov.lv/userfiles/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/bin-xterm-pastebin-free-robux_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/khaos-youtube-free-robux_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/roblox-jailbreak-hacking-apps_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/beyond-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/enter-code-for-free-robux_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/pokemon-go-free-no-download_GM1094591345.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/robux-onlineusroblox-hackunl_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/how-to-hack-roblox-project-pokemon_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/free-rich-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://cfla.gov.lv/userfiles/files/how-to-hack-in-asssin-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_off00002d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D65 22640 bytes
SHA-256: f9b0dae30d5c213241400662a755b01ae6c852b61147836ab13dc720d52e58c0
font_01_sfnt_off00006017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6017 18716 bytes
SHA-256: d879526d17834eef7ec53fa1f2e94fc6027c3862d934ab81bb2be8c7d2c4e18b

Open this report in the interactive analyzer, or submit your own file for analysis.