Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e6f9d39bd78ff4…

MALICIOUS

PDF

80.3 KB Created: 2021-05-01 12:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5dd0b5c074faafbe88b03ba50c16714c SHA-1: 2c085e9e10c353c281424bfc76305c738854db03 SHA-256: e6e6f9d39bd78ff4cb06ad8ca95ac69c6ea2e3d84ce166646ce99701f9dbcbba
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was identified as malicious by ML classification and ClamAV, indicating a phishing and trojan threat. The document employs social engineering tactics, specifically a 'Browser extension/update installation lure' and a 'download button lure', to deceive users into performing actions that could lead to credential theft or malware execution. The presence of numerous external links, many hosted on disposable domains, suggests a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • 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
  • 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://jottigo.ru/strik?utm_term=the+merchant+of+venice+2004+full+movie+english+subtitles PDF link annotation
    • https://rawamujorutemet.weebly.com/uploads/1/3/4/3/134360263/bagutikivipe_pakiguwexagoniv_ximijigumodeg_wowonisiwabev.pdfIn PDF document text
    • https://salofapaj.weebly.com/uploads/1/3/4/3/134314320/zuruzojumozo_posojokerosu_natozugirege_momar.pdfIn PDF document text
    • https://cdn.sqhk.co/riduwadanu/6jf1ghD/82519560263.pdfIn PDF document text
    • https://cdn.sqhk.co/letowajaf/Vljaie4/pictowords_level_7_answers.pdfIn PDF document text
    • http://zitekimuzefovar.iblogger.org/leadership_styles_and_their_advantages_and_disadvantages.pdfIn PDF document text
    • https://zipemulobob.weebly.com/uploads/1/3/4/5/134528333/062c8.pdfIn PDF document text
    • http://winefesa.22web.org/andromonoecious_definition.pdfIn PDF document text
    • http://braco.ru/how_to_to_write_a_business_planuqn32.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/hepww2v/jixiduwinuridutomem.pdfIn PDF document text
    • http://pycnidwzxc.info/witcher_season_2_release_date_ukj3rxi.pdfIn PDF document text
    • https://cdn.sqhk.co/naruxibe/hhhZig0/51068534806.pdfIn PDF document text
    • https://pifujikis.weebly.com/uploads/1/3/4/8/134875168/421c34.pdfIn PDF document text
    • http://pesowulil.iblogger.org/wasted_years_guitar_tab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9dd02728-8b0e-4c16-8a5b-31b14a6ec887.filesusr.com/ugd/d8c3ed_3ecf96214767463e8b013c1dd22a6769.pdf?index=trueIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_a8770e1466294f098ed61587410162a7.pdf?index=trueIn PDF document text
    • https://366cd995-4ddf-4220-a197-7cea849caf0e.filesusr.com/ugd/947062_addefd537dd44a1db4a7f42d5361e85b.pdf?index=trueIn PDF document text
    • http://bexiguxiluk.epizy.com/64986332029.pdfIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_0bb1ec67605f4602bf764137c66b72b2.pdf?index=trueIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_834b160676d845d3bf44589a78e7e2c5.pdf?index=trueIn PDF document text
    • http://ganasoniledaw.rf.gd/13083493278.pdfIn PDF document text
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_858c807e8286456482c38b9d3e1ace6c.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE483 5808 bytes
SHA-256: 09280c83508a13cbe619a46a48e953a78b1f2e574a0d333b8f5cd51c48b1ba64
font_01_sfnt_off0000f829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF829 11188 bytes
SHA-256: 15c325a6a8f4cb4cdb3368b41c01be10ccff1f9c83b787388a9514af4085656b
font_02_sfnt_off00011d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6C 16192 bytes
SHA-256: 782e38977b7d7b48822e4e80b1c2a4f5990fa8b32ca6fb88e147c181cf684755