Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9b01777062600f…

MALICIOUS

PDF

48.7 KB Created: 2021-05-13 05:38:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8b5f9693baa024fdf21ab81385046924 SHA-1: c92a34e64103924a39413d35b6b1117e800bd233 SHA-256: ac9b01777062600f85cfe25a5184edc470c867d0df32b2c2fb9341f421713845
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game currency' or 'hacks' to entice users to click on embedded links. These links redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_GAME_HACK_REDIRECT_LURE' heuristics. The document body contains obfuscated text and URLs pointing to potentially malicious PDF files hosted on a suspicious domain, suggesting a multi-stage attack where the initial PDF acts as a dropper or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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/coin-master-free-spins-links-app-game-hack In PDF document text
    • http://metatg.com.ua/images/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://metatg.com.ua/images/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://metatg.com.ua/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/rbxdemon_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CE 25384 bytes
SHA-256: 59cb3267b3cc52ca6255eb086cc55d834b93974f6355e0b0ef778cc083110a88
font_01_sfnt_off000084a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A7 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off00009247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9247 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off00009c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C36 18056 bytes
SHA-256: 82bd5e5fc9f9c8e10db102fb3f3c15aafc022ab197dd07e70821ea88e25dcd6f

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