Malicious PDF — malware analysis report

Static analysis result for SHA-256 90552825eaed1e49…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 21:18:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 60055c7023bc49b0bc95cd5aba0e5b27 SHA-1: aabd34d9eae6f4608fd6ec04f37223c457b8963c SHA-256: 90552825eaed1e49ad8681922eb1e66adf208fdafe1f80b8b1a33c0cff70cd5b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and generators, such as for Minecraft and Roblox, to entice users. It contains numerous embedded URLs that redirect to external websites, likely for the purpose of downloading further malicious content or leading users to phishing pages. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed for SEO manipulation and user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/479516143/minecraft-windows-10-free-game-hack PDF link annotation
    • https://pustaka.widyakartika.ac.id/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/sunset-coast-gui-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-stop-animation-hacking-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-for-free-on-phone_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/follow-people-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-hack-no-survey-or-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-can-you-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-hack-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/cheats-roblox-paintball_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hack-for-roblox-wont-get-banned_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-without-download-pc_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-my-hero-bizarre-mixture-quirks-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-hack-2021-no-human-verification_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_off000034cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34CB 22636 bytes
SHA-256: 666d982adc13ca233093dec8614c0a7cdc484857873ffb13346689a3af2f3ae5
font_01_sfnt_off000066f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F3 18812 bytes
SHA-256: 64384bfcc58c1bbdf03ee3f883a0be16d7cce96ae7e77f1df9d799b764379cfd

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