Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b5220f32f01aa2…

MALICIOUS

PDF

42.8 KB Created: 2021-05-13 01:41:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 75b5d3247b9f6c690b66264e9fc882b9 SHA-1: 0cfd700d60d9b52feba861d06605ea90b66694c6 SHA-256: 42b5220f32f01aa216723bb862e72051d4a4a05d4fdc56ec51e4951eab013478
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The document body, though partially corrupted, includes the primary malicious URL. The ML classifier also flagged this PDF as malicious, supporting the assessment of a phishing or scam attempt.

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/479516143/how-to-make-your-own-minecraft-server-for-free-game-hack In PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/free-robux-master_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/static-moonactive-net_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/roblox-devil_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_off00004d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D0A 24688 bytes
SHA-256: c35c4326a12337e976306fb4e4ae2bfa44b530514be9c7487db69cf388ca5a40
font_01_sfnt_off00008499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8499 18460 bytes
SHA-256: 43abef8b834297908dc205ac191a436a457546b124377fb637ef7db2584f74fc

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