Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb182cac4f279216…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 06:12:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 20c78f32820e12de670843b802df0d77 SHA-1: 459c4c27567e2a35b1c6f49b13e1746e172f25c5 SHA-256: bb182cac4f279216c2cbce98e76c47ad6146fbc8aeca27bdd0571a426aa9cdf4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the heuristic findings. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/479516143/toolbox-for-minecraft-windows-10-game-hack In PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/how-to-get-free-robux-youtube-aidentm_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/how-to-get-free-robux-for-real_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_004_off00005169.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5169 25204 bytes
SHA-256: c880c2334391254a158816a79042a66c07b25d5f015f907dacd31581b37b6531
font_01_sfnt_off00008b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B57 18968 bytes
SHA-256: d46e351321a59792d0dfcc693b7f7d925f1f4cf90c5f01a19a24ca355f4b74b5

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