Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf81995ded90959…

MALICIOUS

PDF

79.2 KB Created: 2021-03-06 14:47:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d2a7a922ed19b89f995bd2e3d4b43d2d SHA-1: f472822887c191bb5a1189fc65cbfa0ee27f2a9e SHA-256: edf81995ded9095967e0d3ee6d662336797fd09c302e81ba26300b750d1fd2f5
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one prominent URL pointing to 'dugedepap.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to contain metadata related to its creation, but the primary threat stems from the embedded links designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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 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://dugedepap.ru/strik?utm_term=supply+chain+management+information+systems+definition PDF link annotation
    • http://gitikirazidapi.medianewsonline.com/cooler_master_storm_stryker_dimensions.pdfIn PDF document text
    • http://giwewigipebi.medianewsonline.com/moworebosiga.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/canon_pixma_mx432_change_ink_cartridge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_6012bcdb7ece9.pdfIn PDF document text
    • https://cdn.sqhk.co/rajosibakulu/fkHjgig/splashlearn_measurement_games.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/fljaWie/bomuvudugewivulebana.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/every_mans_battle_book_review.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/Rifidjf/kivudip.pdfIn PDF document text
    • http://vonokumi.iblogger.org/metric_unit_conversion_and_scientific_notation_worksheet_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374984/normal_6016c1527b6e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://butadiviwev.rf.gd/59867678770.pdfIn PDF document text
    • http://natetagawavitir.rf.gd/nivojuso.pdfIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_b5d4b68d852c4904adc496d3295f9085.pdf?index=trueIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_6aeccd3a62ae4254823c5cf168eaf7a1.pdf?index=trueIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_06cebc077b244bc5b713a968ee92697e.pdf?index=trueIn PDF document text
    • http://tuxabatadifu.onlinewebshop.net/is_cyberpunk_ps5_exclusive.pdfIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_f8e52aa5f3274d659088a82e3e2a0926.pdf?index=trueIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_6ca747c0e88a4b39a7cc89e831008cd7.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_911bac774cdb4a5691dee0ec5c9ba772.pdf?index=trueIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_b662959091004139857e2a5b8f8d14b2.pdf?index=trueIn PDF document text
    • https://d6ac5066-27fc-4e71-a07d-b30af50dfe8b.filesusr.com/ugd/934fc3_9a8b66436609459ca561df0b0c355d20.pdf?index=trueIn PDF document text
    • http://nopetavu.rf.gd/10353313324.pdfIn PDF document text
    • http://xizefuta.rf.gd/85442980529.pdfIn 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_off0000f764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF764 5776 bytes
SHA-256: b1580556a0cc92d3f2af44bb8cf8679480782287989e8457c32c779fac770ea5
font_01_sfnt_off00010af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF2 10472 bytes
SHA-256: 5a00db9385720f85e0d686db9283afc7d536db8439340b3d40e585229492a868