Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad124df8f105f256…

MALICIOUS

PDF

35.2 KB Created: 2021-06-19 19:41:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cbb984c5a7e83fcb94c0b8ced383f05d SHA-1: 1c4bd43919e29be88396e91d6bfd63d1a1a3e540 SHA-256: ad124df8f105f256046857c9546a8a3c2e707ecbbaea6525a792b160d9a0588b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox. The document body and heuristics confirm the intent to lure users to click these links, which are designed to lead to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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/pastebin-roblox-hack-game-hack In PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-hack-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-get-robux-for-free-on-bowser_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-free-red-pants_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/wie-kann-ich-robux-hacken-website-liste_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/como-hackear-cuentas-de-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-hack-unlimited-free-robux-tickets-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-robux-redeem-card-codes-2021_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_off00003134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3134 22924 bytes
SHA-256: aa37b7b76d1c760c77b662c6c888db165dcb2fef91efdd862e236dfc9edeb074
font_01_sfnt_off000064b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B5 19032 bytes
SHA-256: 4abc9e0581d5132e776f7db6c145757cbb493d176963ec050d2039e6c3cb16a9