Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6aa0cce1bcc7ea…

MALICIOUS

PDF

77.0 KB Created: 2021-05-02 17:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2d4b2bd062ebcb1225ab161e140b9344 SHA-1: ed43d2503898000595605c630ff2798b49b05b4a SHA-256: dd6aa0cce1bcc7ea643f5bf28c50b4adb56c3fc4741f391bcb68aa653037a5f4
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, including one to 'mezovuduw.ru', which is likely part of a link farm or phishing operation. The PDF's content is a lure, disguised as a guide, to direct users to these malicious sites. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://mezovuduw.ru/strik?utm_term=how+to+put+self-adhesive+vinyl+tiles PDF link annotation
    • http://ig-copyrightviolation.com/benshaw_mx3_controller_manualj2rwx.pdfIn PDF document text
    • http://autocredit.moscow/suvuko3dhpk.pdfIn PDF document text
    • http://f13x.xyz/vomevudusazixidofidovuvoxhcwm.pdfIn PDF document text
    • http://eu-study.ru/simple_list_app_easy_checklist_201906eht.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b45bc05-489d-4c0f-b018-631ef8e3338b/95368386284.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/scapular_adduction_manual_muscle_testing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d4c672-e455-439c-8aad-5637e3c8eb4b/how_to_boost_your_sims_mood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a265a02-1a21-4cec-90cf-880065b5b7ff/sharepoint_designer_2013_tutorial_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/how_to_strengthen_your_gluteus_medius_muscles.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_a8aba1b70b8147b1955af90df18daa50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waduzirader/50829732884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/764cf41c-5706-476d-bdd9-343ff7f36727/lean_startup_book_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/how_to_sue_someone_for_damages_uk.pdfIn PDF document text
    • https://7fd9f749-07b0-48f8-ad51-68075edef824.filesusr.com/ugd/197648_2989fcddaf6e4a06bf5aa00378e91247.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/casio_fx-_991es_calculator_manual.pdfIn PDF document text
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_080eaf1a39ca45bba455d2b65efde5f2.pdf?index=trueIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_7c1afbb4d9b74782beeedac8b5f78139.pdf?index=trueIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_d3734482f712479d8cfeab5f812b2ac1.pdf?index=trueIn PDF document text
    • https://e3c65705-3664-417e-97b1-2ac29bfab8bd.filesusr.com/ugd/6a5da5_8c41c07776c44fc6a0f40c17bde828ee.pdf?index=trueIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_8d1b5a86197344d29a936cb6d59d8a85.pdf?index=trueIn PDF document text
    • https://ad646471-8556-449a-8150-55a6f6ff724f.filesusr.com/ugd/7a1c5b_6fd4640c1ee5498d9c2adbea1c211b23.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_off0000ee63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 5280 bytes
SHA-256: eae6e80aaf2818a638c1e031e0a64acde33d1e39c1fa84c4546e2a400fae724e
font_01_sfnt_off00010079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10079 11300 bytes
SHA-256: 20a522a235e7c36605d5aea91f35363c43fc50fd6516902ed8a97ad6d976e866

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