Malicious PDF — malware analysis report

Static analysis result for SHA-256 b35171666d26c30e…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 09:24:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a8e4e3f2694a06e9d978c06c3e45592f SHA-1: 34dc96c6ad5440a2fd844dd1b9095754ff4e9ec1 SHA-256: b35171666d26c30e9da382b660cfa5f4bc87569521512c1133b6233e0ca41b3e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as free game hacks or generators. The primary lure URL is 'https://netcdn.online/app/479516143/minecraft-pe-016-0-apk-download-free-game-hack', which likely leads to the download of a second-stage payload. The document body and embedded URLs reinforce this lure, aiming to trick users into downloading and executing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/479516143/minecraft-pe-016-0-apk-download-free-game-hack In PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-mobile-hack_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_004_off000054de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54DE 25448 bytes
SHA-256: 8efe467cc6afc28e91e62c3518ed6d4f7cb61228cbd4f9a1526450f0cc173dd6
font_01_sfnt_off00008d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8B 19236 bytes
SHA-256: a63dd01408f91a6891b380631e9b9ef38a24a18d267ddcf0deb2880c3b0dbcab

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