Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d3cdb74da42a7c…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 08:13:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 242d8d78f4afe5782ae1247ca67f7c80 SHA-1: 4ead0b25f5a2bad514540494406fbbacded25105 SHA-256: a9d3cdb74da42a7c8f3fd952dc5af5e84ade91118556152cd98b5c2def094565
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a QR-code lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 https://netcdn.online/app/479516143/minecraft-name-tag-hacks-game-hack PDF link annotation
    • http://library.itekes-bali.ac.id/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-treasure-hunt-simulator-202120219-cheat_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-items_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/body-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • https://youtuIn 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_off0000557a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x557A 26608 bytes
SHA-256: 1b5dba242bd9a3b5fb339cf7a21bf1f11156cfb8965288371174cf094686604d
font_01_sfnt_off000091eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91EB 18288 bytes
SHA-256: eb7ed4260d6d64c3cd9f3242d6af3157cea31df7eff6e4be90ec8e6c005c47d1

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