Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b2ba5723b7dc09…

MALICIOUS

PDF

92.2 KB Created: 2021-03-13 13:06:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31320c699ad824a0547e786effa59fb8 SHA-1: 9bdf1d888cb1e4fcb96031725457b85c1cd108fd SHA-256: e2b2ba5723b7dc099cf3889415a1b5a4dfae1c25162e3dd2c8c1f9bf8d37e941
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with a primary link pointing to 'dafemum.ru', suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_LINK_FARM' indicates the PDF's purpose is to generate numerous external links, likely to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://dafemum.ru/award?keyword=ateizm+ile+ilgili+kitaplar+pdf
    • https://static.s123-cdn-static.com/uploads/4389821/normal_60073f2c4efc0.pdf
    • https://cdn-cms.f-static.net/uploads/4462075/normal_600e91b62b61b.pdf
    • https://cdn.sqhk.co/vixemujomu/sLjjFmq/finuzik.pdf
    • https://vebajixumese.weebly.com/uploads/1/3/4/4/134483039/turixonejox.pdf
    • https://cdn.sqhk.co/wigatozaduw/hhchhjd/t_mobile_connect.pdf
    • https://cdn.sqhk.co/watexoba/ghCIiie/asphalt_nitro_online_hack_tool.pdf
    • https://cdn.sqhk.co/silinetufid/hgdDifl/angelo_s_soccer_corner_locations.pdf
    • https://cdn.sqhk.co/pupevadojas/GjcfMjh/88780993705.pdf
    • https://cdn.sqhk.co/jogepirar/jcE6oSm/xizukipaseva.pdf
    • https://fabavowugofafif.weebly.com/uploads/1/3/4/5/134591931/gavizeka-ferab-residovif.pdf
    • https://cdn.sqhk.co/fugovigul/xjiF1Z4/bitmoji_sign_up_with_gmail.pdf
    • https://zozutogumudeke.weebly.com/uploads/1/3/4/4/134440166/6db3e94205b6.pdf
    • https://cdn.sqhk.co/jabosuve/hibiga2/rollercoaster_mania_cheat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6e466e42-fe65-430c-8999-b507b7bedd6c/32454358932.pdf
    • https://uploads.strikinglycdn.com/files/10646344-2981-4e21-8196-759649185e72/76918046087.pdf
    • https://uploads.strikinglycdn.com/files/fb84f274-0836-467f-82e7-7290d8c650a3/setako.pdf
    • https://uploads.strikinglycdn.com/files/b6c5125b-6a24-4938-b372-734d490a1396/oral_b_5000_vs_6000_vs_7000.pdf
    • https://uploads.strikinglycdn.com/files/9134d0ef-94d8-44fd-80f8-3a538828d925/table_decoration_ideas_for_winter.pdf
    • https://uploads.strikinglycdn.com/files/c9c526fe-10a8-4970-acaa-8096e93f1405/war_and_peace_by_leo_tolstoy_short_summary.pdf
    • https://uploads.strikinglycdn.com/files/fcd2562e-d34b-4911-b83b-4adaf5a48df9/how_to_adjust_pressure_on_bostitch_nail_gun.pdf
    • https://uploads.strikinglycdn.com/files/044ecff2-c025-45fa-8acc-7e8f356eac26/ar-15_sling_swivel_rivet.pdf
    • https://uploads.strikinglycdn.com/files/656574bf-873f-41de-b906-a6316252f174/reading_order_of_three_dark_crowns.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125d7.bin
3b6df1c0d20f648b3aef1ec34a1db3e966dea3aaab92649e0d77a1715bac6074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125D7 5288 bytes
font_01_sfnt_off000137ca.bin
4e22d8db3f322e6ddba1438ef3d9a897d3deb2f77cc6a5b65a3a60ce27573575		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137CA 13728 bytes

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