Malicious PDF — malware analysis report

Static analysis result for SHA-256 98df0cd737cbbdbc…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 05:28:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7e64be078bba05582500855ea8e0e5cd SHA-1: b18a9a34cc1707e26e071982861e4474a25d4fda SHA-256: 98df0cd737cbbdbcc9b090c072b5e42e0749294ccf184a0b207e987b76672fe0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and references to 'game hacks' and 'free currency' for popular games, designed to trick users into clicking through to malicious websites. The ML classifier strongly indicates maliciousness, and the embedded URLs are consistent with phishing and malware distribution lures. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it acts as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.tw/app/431946152/free-roblox-clothes-for-your-avatar-game-hack PDF link annotation
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/how-to-have-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/free-robux-offline_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/roblox-file-for-hack_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/free-robux-may-2021_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/free-valid-promo-codes-generator-roblox_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/follow-people-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/inappropriate-roblox-games_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_off00002cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CBC 22388 bytes
SHA-256: 5edead9fa41cacc1c06b3c017b1c2fe3f7770e8d19cc6a90bbdf3e209ded1f5b
font_01_sfnt_off00005e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E84 19336 bytes
SHA-256: 86a71e0106685879ae6faa5057e386fbe27a7aabf9ab932ee5abb54a7eaf4a24

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