Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ebfb610d584b8c…

MALICIOUS

PDF

54.1 KB Created: 2021-05-14 20:30:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 96adcb561c4ca48e743cb40d57548d8e SHA-1: 040ebed0637a9e49fa9e06e733530a076cc1d389 SHA-256: 66ebfb610d584b8c038ec907e9b8160984628511627ee2b1ad551db05a928886
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, masquerading as 'game hacks' and 'free generators'. The primary lure, 'how-do-you-get-free-robux-without-paying-game-hack', directs users to a URL that likely serves a malicious payload. The ML classifier also flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9403

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/431946152/how-do-you-get-free-robux-without-paying-game-hack In PDF document text
    • http://uristdona.ru/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://uristdona.ru/images/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://uristdona.ru/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://uristdona.ru/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D67 30304 bytes
SHA-256: f0aa446c0fc566ae1f133a2e6af95c5eaf19f28ae835d842693e74f1568c6086
font_01_sfnt_off0000901f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901F 8760 bytes
SHA-256: 6c2c40047b423698bc6c06fc6010fa114c5776cc1b280aece4d657cd046e073e
font_02_sfnt_off0000acb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACB2 19948 bytes
SHA-256: 5d1001e3ac77277796354ae1628373f4f4a3ba3fa344903a86c4555bafe1b783

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