Malicious PDF — malware analysis report

Static analysis result for SHA-256 adfaa28b72fc12de…

MALICIOUS

PDF

33.0 KB Created: 2021-06-18 07:36:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f0ca549cb9ca2cf95caeaba20a26346b SHA-1: 300b61c0405c410832c606d85e2fd28fab9dd9e9 SHA-256: adfaa28b72fc12deabe5b8914f4f6c5e9ca325dd70f6e983a7262bc057f29345
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency or hacks, directing users to the URL http://netcdn.co/app/431946152/robux-free-no-offers-game-hack. This URL is flagged as malicious and is likely intended to lead to a further stage of infection or a phishing site. 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 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.co/app/431946152/robux-free-no-offers-game-hack PDF link annotation
    • http://repository.ummy.ac.id//repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-spin-link_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-sad-cheating-story-lbert_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-robux-generator-virus_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-models-free_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-hack-roblox-defenders-of-robloxia_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/every-free-item-since-2021-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/robux-hack-free-robux_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_off00002c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C67 21860 bytes
SHA-256: 40534b08363330003bfea0317290b6b5ea497333d03f969623aa01d640516ea7
font_01_sfnt_off00005ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA5 18716 bytes
SHA-256: 5f3bba027059077fef8abc55f603bd8b6fe6ed56a9ddfef5b976587d0fea24c2

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