Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3d26ea8f9317bca…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 11:03:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 04624ed89ddde920accd7ad7323e560e SHA-1: 001a5c626d668f2530b31a7966bc95d0f08f09c8 SHA-256: c3d26ea8f9317bcabc5eaf9732159c9bb8863ff637a55b720a5d5ecddeb7c34d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to external websites, including a known malicious redirector. The document body and heuristics indicate a lure for game hacks or generators, suggesting the intent is to trick users into downloading potentially unwanted or malicious software. The presence of numerous PDF links to domains like 'pesok-rk.ru' further supports this malicious redirection pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/download-hack-coin-master-apk-game-hack In PDF document text
    • http://pesok-rk.ru/images/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://pesok-rk.ru/images/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://pesok-rk.ru/images/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://pesok-rk.ru/images/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/body-roblox_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-hack-tool-india_GM406889139.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_off00004a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A10 24876 bytes
SHA-256: a9dd4142bbdf92275a1236d1b254d4cc22496930d97e8d856960323c4df126b6
font_01_sfnt_off000082b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B9 18472 bytes
SHA-256: 48f2fb6a54f4a1d4da48af3cad9101beb926a58239587b90eb535e02f3a3ea4e

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