Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e191547f981da1…

MALICIOUS

PDF

72.0 KB Created: 2021-04-29 01:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d40cd5ab3edb0e39c570fde2a96664de SHA-1: bea23fc8b57f282914d5eda681024c8f0d298844 SHA-256: 45e191547f981da19d809cb3ecd5668deff18b5fa66da4419ed08eab00144b6e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to a snowblower, aiming to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=toro+s-620+electric+start+snowblower PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494166/normal_5febdf2b31d83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467560/normal_5ff361919dfe6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482405/normal_5ffe13462df8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451757/normal_601e1f01053c1.pdfIn PDF document text
    • http://sutiwejepeb.22web.org/93773873064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_60404418a64e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_600be66a4512e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367640/normal_5ff07d1f1a592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471273/normal_60200e52c61be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://givonomiruf.rf.gd/medical_terminology_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/c_format_binary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/528138a5-93cf-46d6-8562-581e2cc79cea/81592547012.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/hp_6500_printer_ink_system_failure_message.pdfIn PDF document text
    • http://nowivopikuzud.epizy.com/algorithm_design_manual_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0793ac41-8fcd-49de-ae87-30e9fa94089c/sakelegolomosibowusevidut.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/jesus_message_images_telugu_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/relative_pronouns_exercises_multiple_choice_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd2ef7d2-5af2-411d-8587-d4d23ffb8acf/sun_joe_spx3000_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/252a38ac-27f5-4282-856b-78427f951e9a/mawijutesut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c0852c9-80e7-45f2-aff3-40e3d271d22a/2018_tesla_model_3_for_sale_near_me.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_off0000d79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79C 5432 bytes
SHA-256: 9ace2457b9a1737f3393c00e30a25de1aeae98e20719a06f597474ecc47bbc4d
font_01_sfnt_off0000ea38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 11912 bytes
SHA-256: 70285aa8f188abfc6f24e320d2dcbc7f6d28bb648d091c6ab7cda92abc69c41a

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