Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed86cb7ae07fcadc…

MALICIOUS

PDF

41.7 KB Created: 2021-05-11 16:40:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ff88d23812adf9f6125ad208170e4293 SHA-1: 2084eb582fa2ef2b1634b8e614b2e4ada82636b6 SHA-256: ed86cb7ae07fcadcd29cde17e3c33f087b35c7f3b7157db8c95dd39472b44902
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "game hacks" and "free generators". The primary lure URL is https://netcdn.xyz/app/406889139/fbchampion-game-hack, which is part of a chain of redirects. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a redirection-based social engineering attack.

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/fbchampion-game-hack In PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-spins_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • https://www.stylafik.in/uploaded_files/userfiles/files/bloxpage-free-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_off000049f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49F1 24020 bytes
SHA-256: 9463f44298b086f446345e700c7db833a404b9ace78f5f32f9f2ed73e5067661
font_01_sfnt_off0000808a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x808A 18364 bytes
SHA-256: a6b0af27d4d3b45433f1bf9322c4fc5530f0836706fea914cb1eef9ee3408c10

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