Malicious PDF — malware analysis report

Static analysis result for SHA-256 e182301a4e2afa79…

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 07:32:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d20107766164dcf92b26962b74450475 SHA-1: 0c3759b3158df35399d4e7d9dda411fc05b4d6a2 SHA-256: e182301a4e2afa79e07dd82da28542bdfc2a3464ed395fe93658a134576a9a2e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free currency for games like Roblox and Coin Master. The ML classifier strongly indicated maliciousness, and the presence of a visual download button lure further supports the deceptive nature of the document. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/431946152/roblox-hack-download-pc-game-hack In PDF document text
    • http://metatg.com.ua/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://metatg.com.ua/images/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://metatg.com.ua/images/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://metatg.com.ua/images/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://metatg.com.ua/images/how-to-get-free-robux-website_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
stream_003_off000047e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E8 25376 bytes
SHA-256: f8592d40976f123b2bb310d5c3a453f59d253e88dd4c9ee4e58861b1f750909f
font_01_sfnt_off000082c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C7 18844 bytes
SHA-256: 78e662fc8066b17092395b08137e99af0342e3f29fa403ad8e1f9446b0d64eeb

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