Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ee9ae448498ea2…

MALICIOUS

PDF

42.2 KB Created: 2021-05-13 13:02:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 12a363171ee8a93d2e79d965ca4a191e SHA-1: c84e471bae03456101d6b034c98a5ab84a063626 SHA-256: 44ee9ae448498ea290da827a27eeb113f556710321369163f3b6a93ae9f53f15
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and currency. The document body, though partially corrupted, contains text related to 'free spins coins coin master' and a URL that aligns with the heuristic findings. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lure users to potentially harmful sites.

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/free-spins-coins-coin-master-game-hack In PDF document text
    • http://easytransferbrazil.com/images/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-800-robux_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/robux-gratis_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-free-robux-no-human-verification_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_off000049b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B1 25536 bytes
SHA-256: bf000d518f1f5732f3d7da3049106c62722f0d210fad7d4b0116c1196e8411f5
font_01_sfnt_off000083b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B2 17884 bytes
SHA-256: 18816d8d761583b578c9833b8849e2eeaed27ef2f16a893d2032c58e3f8148b6

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