Malicious PDF — malware analysis report

Static analysis result for SHA-256 e985081bdbab75fe…

MALICIOUS

PDF

43.7 KB Created: 2021-06-13 23:56:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4a0798f0a40544b879839d08697f6c62 SHA-1: 64ced256f5587b4e02c823934938728f665dd40c SHA-256: e985081bdbab75fea10c0350bcde98012033d3cee817d043d1c9a6c349c64c44
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm designed to redirect users to pages offering game-related cheats and hacks. The ML classifier and PDF SEO link farm heuristic strongly indicate malicious intent, likely to distribute malware or lead users to phishing sites. Although no scripts were directly extracted, the document's structure and embedded links suggest it's part of a phishing campaign aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 http://netcdn.co/app/431946152/roblox-code-for-break-free-game-hack PDF link annotation
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/how-to-hack-the-chat-roblox-no-download_GM431946152.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/dead-by-roblox-bloodpoints-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1tapteng.sch.id/__statics/gudangsoal/files/moonactive-free-spins_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_003_off00004ba8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA8 25816 bytes
SHA-256: d8555dc434133f9255afe17fd178c816d31d50257f6a2603a94711ba8424f114
font_01_sfnt_off000087f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F7 18520 bytes
SHA-256: 8170d96892234ad111d2bd8d71172a4177ebe479e3742dd11bfe9f69ebcf36a3

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