Malicious PDF — malware analysis report

Static analysis result for SHA-256 579797fff9e8c2e0…

MALICIOUS

PDF

43.8 KB Created: 2021-06-04 01:17:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 75ca4a2c49c0cdacda2cd2dea26c64fc SHA-1: 21bf05fa322c400ca49d7e853d60ba01771aa457 SHA-256: 579797fff9e8c2e0492a14bf64ed6c8908ce2857a4308a3399e01cf0d3ab7f16
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, identified as a link farm, pointing to various game-related hacks and free currency lures. The primary URL, https://netcdn.online/app/431946152/roblox-gang-rape-game-hack, suggests a malicious intent to redirect users to potentially harmful content. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.
  • 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/431946152/roblox-gang-rape-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pubg-uc-20210_GM1330123889.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-cheat-codes-free_GM406889139.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_off00004e50.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E50 24848 bytes
SHA-256: eccd885fa333476d5bc3b217d6ac5ddaf95289eb7116d115022bfb931b985c8d
font_01_sfnt_off000087b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B5 18476 bytes
SHA-256: 84738463155765abaa87378d822747d6195530926b9c88b60ea2d23f4db24e12

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