Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8441e5a37706722…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 01:29:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5caa9b70594e0c9eeb37b1c2cd566a49 SHA-1: 35b8f13b570860e0ebb2683456c9e1f6038b40e6 SHA-256: a8441e5a377067223753da9df6b2ecc27237d8e5bce723a52b3aa8a74b422954
160 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to a known malicious redirector infrastructure, specifically advertising a 'coin master free spins hack'. The document body also contains the same lure and URL. This suggests the primary purpose is to redirect users to potentially malicious content or further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-hack-but-no-surveys-game-hack In PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/how-to-buy-anything-from-roblox-c-atalog-for-free_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/how-to-hack-roblox-phantom-forces-aimbot_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/ios-roblox-hack-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/rbx-roblox_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/roblox-no-clip-hacks-every-game_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/how-to-hack-games-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/minecraft-client_GM479516143.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/free-robux-and-tickets-hack_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/free-robux-free-no-hack_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/hacks-for-roblox-working-weapons_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/roblox-speed-client-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.wearmyspex.com/uploaded_files/userfiles/files/free-roblox-girl-clothes_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_002_off00003169.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3169 23280 bytes
SHA-256: 3f8b13afc3781de93422e408caf1ee603f13964fd53993f69ce885d94c6c10e6
font_01_sfnt_off000065db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DB 18992 bytes
SHA-256: 97804845bf467d2aeff7c85d47b4467823aac43885222e40ee61a94876ec16b2

Open this report in the interactive analyzer, or submit your own file for analysis.