Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ab6e1ec22cb615…

MALICIOUS

PDF

34.7 KB Created: 2021-06-27 22:04:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d77e13750d3f43c52447ae8816461569 SHA-1: cd161d6a54117e9ca9d8c148ff7de73aadb42acf SHA-256: 44ab6e1ec22cb61537040844fc35b5b38ae8c094b352818edbfcb6035e2011d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically a 'game hack' lure. The document body and embedded URLs reinforce this, pointing to a link that is known to be malicious infrastructure. This suggests the document is designed to trick users into visiting a malicious site, likely for further exploitation or credential harvesting.

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.co/app/431946152/what-happens-if-you-hack-on-roblox-game-hack In PDF document text
    • https://www.wessexandrology.com/uploads/files/files/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/free-musket-model-roblox_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/free-robux-generator-no-human-verification-no-survey-or-offers_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/roblox-anti-cheat-2021-script_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/roblox-how-to-hack-games-2021_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/bloxburg-free-play-roblox_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.wessexandrology.com/uploads/files/files/minecraft-windows-10-key-free_GM479516143.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_off00002fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA5 22184 bytes
SHA-256: b38f84821f496fb6508738f4ec86923db23585c571fdfaf1643dc8bb6970044e
font_01_sfnt_off000060af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AF 19604 bytes
SHA-256: 1089fb80b0bd8920974fc929ea655232a45a57bd739f57f3350d3d7d63b0b716