Malicious PDF — malware analysis report

Static analysis result for SHA-256 1594c2ed2df1803a…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 14:44:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a0841f67ff0fe4164e1530a13bd9f229 SHA-1: d670d78c0a38f373ef7abef27b046904d13cce49 SHA-256: 1594c2ed2df1803abd13c6f204a57f782c747fccc6fb13bd2e57fe6c7650f5b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, masquerading as a 'free generator / game hack'. The document body and extracted URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and malicious links suggest an attempt to redirect users to a malicious payload or phishing page.

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/431946152/can-you-get-robux-for-free-game-hack In PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/how-to-be-headless-in-roblox-2021-for-free_GM431946152.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/roblox-theme-park-tycoon-2-money-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/medieval-hood-of-mystery-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/free-robux-no-survey-no-download-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/how-to-hack-roblox-mad-city-gui_GM431946152.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/case-clicker-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://www.pswpallets.com/uploaded_files/userfiles/files/roblox-hack-me-robux_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
font_00_sfnt_off00003005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3005 22268 bytes
SHA-256: 7c77ee8f0e50f97688a5080da93ab0252b1f7b6ec07ca2aaf01a3b241aeb8286
font_01_sfnt_off00006177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6177 18984 bytes
SHA-256: 2c6f447800a96913986af3bd62aa8a594d802346a7a39b4742ef2d084cdb3097

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