Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2d1c712087ed4f…

MALICIOUS

PDF

79.7 KB Created: 2021-03-30 06:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6d0c385b8f71a7b99eab11c2e85f6197 SHA-1: 04215511a7d3c8422049f0898fde15318d7d0202 SHA-256: 5b2d1c712087ed4f54bd9810a585ada71678ea4b3259b2d06bfd6e5f054f24c4
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of techniques used to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://vilenefex.ru/strik?utm_term=mackie+1604+vlz3+manual+espa%25C3%25B1ol PDF link annotation
    • http://goladelexugezi.sportsontheweb.net/91368007899.pdfIn PDF document text
    • https://tumokisomagen.weebly.com/uploads/1/3/4/8/134897409/9719873.pdfIn PDF document text
    • https://cdn.sqhk.co/movijomo/CdifjjW/my_little_baby_jaya.pdfIn PDF document text
    • https://mivosubewo.weebly.com/uploads/1/3/1/4/131407796/2378247.pdfIn PDF document text
    • https://bovabesizepin.weebly.com/uploads/1/3/1/3/131383515/gidafudorojalar.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/hjBhfYQ/kanto_yu2_bamboo.pdfIn PDF document text
    • http://dusejetiwogodad.getenjoyment.net/vokejixosebitaretinifaka.pdfIn PDF document text
    • https://jasitonil.weebly.com/uploads/1/3/4/0/134096785/finala-vadararasunas-komezel.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/72089566344.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/7a2d1cdd-26a9-42fa-9489-4d38ac407bad/what_skills_do_you_need_to_be_a_criminal_lawyer.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/ccproxy_8_keygen.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/logarithmic_and_exponential_equations_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/49089556954.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/mayo_clinic_cardiology_mcq.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/merchsource_projector_entertainment_ii_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/sorezufolunawerikavuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21728d89-f18c-4df9-84e2-5cb10197a2b3/bissell_spot_clean_proheat_pet_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03a12be9-d034-4d80-bc44-dc9a14d64cbc/jaribivixebumorukaxafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4106d2d-9873-4cef-8476-920fd63b9081/how_to_cook_a_turkey_in_a_roaster.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/61214534410.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_off0000f5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D3 5972 bytes
SHA-256: 6cd1c680c458a16e6b24e1e252ec3b98c57cfda525ab68fc461faa868ce3adb9
font_01_sfnt_off00010a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A02 11364 bytes
SHA-256: 414de566530bc2ad1b8b027546f077cc33c7b7b05dcaa7b3bfb9ac7c9508a238

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