Malicious PDF — malware analysis report

Static analysis result for SHA-256 56943c1a133fead8…

MALICIOUS

PDF

35.0 KB Created: 2021-06-27 02:37:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f36fdd240e0013780dbb5a0ac6db0bea SHA-1: 4a5591ee40b35a08cd8b8b9225e972d995c9d546 SHA-256: 56943c1a133fead81023e96bc50b1c174f65a2b07bb27be08be76054366f52a2
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links that redirect to malicious infrastructure, masquerading as game hacks and generators. These links are designed to lure users into clicking, likely leading to further malicious content or downloads. The document body and heuristics indicate a clear intent to exploit user interest in free in-game items or cheats.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/annoying-orange-costume-free-on-roblox-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/can-you-get-banned-for-cheating-on-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-gift-card-generator-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hacker-roblox-bobsponga_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-cheat-engine-check-cast-v3_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-script-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-tycoon-donation-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/get-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/lua-roblox-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-generator-2021-no-survey_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_off000030e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E9 22372 bytes
SHA-256: b010f7345710d7f87081a1ce99712ccf404f7c608b7d1887df4c4a580f9cd99d
font_01_sfnt_off000062ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CA 19452 bytes
SHA-256: a2c35c5b8e7656c6b1338f08a75d0ec7d3f16695839c6285f2ad2241ec3e2ae9

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