Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d8a4bd4b90003e…

MALICIOUS

PDF

36.1 KB Created: 2021-07-01 18:09:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 49537161f1164680d2ee5196963df53d SHA-1: 94046aa088626f8478ff8d6e2e1262093dd65e8b SHA-256: 98d8a4bd4b90003e3c8c9aa79564d4e4b9b7e79cc18157d9357da4635413bcef
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are presented as download resources for game-related hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs and the document's theme point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/how-to-hack-roblox-admin-commands-script-game-hack PDF link annotation
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-hack-songs-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-make-t-shirts-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-a-dominus-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/is-there-any-way-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/www-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/light-pack-roblox-mining-simulator-free_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-on-a-ipad-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-mad-city-hack-blog_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-do-you-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/prestonplayz-roblox-account-hacked_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-robux-cheat-engine-download_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-cheat-download_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_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_off0000346d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x346D 22428 bytes
SHA-256: 36d07964efda6322ccc257fbd146053e82111b1ca36b90dd9b8260ab5e1562e8
font_01_sfnt_off00006664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6664 19656 bytes
SHA-256: b3348c88ccbc7e7b321a1768b29a5b5f35b2b3b56b85bba2892cea2ee94499ff

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