Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9ee62d7c72e22e…

MALICIOUS

PDF

76.5 KB Created: 2021-03-08 11:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 94f999571ec379d4db64269ae4a618c6 SHA-1: b624b23a35239b25a716a47fabfc2adcb3d08157 SHA-256: 4e9ee62d7c72e22e70766a536e2a864280ee59b40cc3a5cd7e205a2a81c6765d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm or phishing lure, directing users to potentially harmful websites like https://botokaw.ru/strik. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/strik?utm_term=can%2527t+find+xbox+one+controller+bluetooth PDF link annotation
    • http://zanodopowe.sportsontheweb.net/epson_xp_410_how_to_print_without_color_ink.pdfIn PDF document text
    • http://appless.space/smps_circuit_diagram_with_explanation_pptudry3.pdfIn PDF document text
    • https://kobivepetere.weebly.com/uploads/1/3/1/8/131871499/3159212.pdfIn PDF document text
    • http://verifybadgehelp.com/samsung_s20_ultra_512gb_release_date_australiavibf9.pdfIn PDF document text
    • http://italywow.pro/64692730632wkwbs.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/the_pigman_summary_chapter_13-15.pdfIn PDF document text
    • http://daliadiago.com/because_of_mr._terupt_full_book2kkxl.pdfIn PDF document text
    • https://wonakusoxenim.weebly.com/uploads/1/3/5/3/135340368/diruzofewelofepaz.pdfIn PDF document text
    • https://wanalepawipetep.weebly.com/uploads/1/3/1/8/131857983/4878989.pdfIn PDF document text
    • http://lovelyhouse.online/elemental_dungeon_1.1_mod_apkskawk.pdfIn PDF document text
    • http://kudretbozaci.com/59462006754zjt93.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_b9bb5827213d40b2b4ec5d1853853965.pdf?index=trueIn PDF document text
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_75ee569951e440848000354e13952ec6.pdf?index=trueIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_54a5460116f44b85b03351da56e5f254.pdf?index=trueIn PDF document text
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_d9e26b9c32ed42fc9833a82105ac2357.pdf?index=trueIn PDF document text
    • https://3c2b787d-8465-4662-bdcc-bf736d584291.filesusr.com/ugd/8760e7_a879b84fcf674dd1b0bb086e29894c54.pdf?index=trueIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_e3c075ab87554995960840d244530a74.pdf?index=trueIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_d488ac76b1d441d3abefb3b1584d1982.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF23 5076 bytes
SHA-256: 7c8b52fa3e9d6c4d30113dd18251b08e29e803f8426157667f7939ba0d2e89d0
font_01_sfnt_off00010065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10065 10504 bytes
SHA-256: 7277ed3beb25f1ca046da297793d369f08d0a27977bcba7d9a469ae02fb8016c

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