Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdaffca5ea92924c…

MALICIOUS

PDF

34.2 KB Created: 2021-06-17 20:56:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9baeb4539172599d0a258d6fd0bd6f15 SHA-1: 754f0a95985ed9645692ac20fdf64240ef87a3a7 SHA-256: cdaffca5ea92924c258ed2cff01bf527660e5d480b246026d668a73df4fc28f4
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free items to trick users into clicking malicious links. It contains numerous links to external PDFs, many of which redirect to a malicious infrastructure. The primary redirector URL is http://netcdn.co/app/431946152/killaura-hack-roblox-pastebin-game-hack, which likely serves as a gateway to further malicious content or exploits.

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/killaura-hack-roblox-pastebin-game-hack In PDF document text
    • http://svadba-moda.kg/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-hack-ultimate-driving-roblox_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://svadba-moda.kg/images/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-advanced-warfare-tycoon-cheat-codes_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/anti-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://svadba-moda.kg/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/noclip-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-hack-robux-infinito-download-2021-pc_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-hacked-accounts-list-2021_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-join-anyone-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-get-free-robux-hack-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/hack-for-roblox-jailbreak-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_off00002f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F12 22452 bytes
SHA-256: 3841b874766b04046d358c8767a593e2cd29653cf26d02569d72ee52009eb607
font_01_sfnt_off000060ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EE 18988 bytes
SHA-256: 6063295020dfc8c18a9d114329f8aae3315d61264d9fe1c6e6a5320a8d444cec

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