Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a12d8f746456746…

MALICIOUS

PDF

78.0 KB Created: 2021-03-31 00:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ab692ee007d8f659b44d2f1270051ec4 SHA-1: 698167d5d1efaba9ec6fa01271f1fd648850756a SHA-256: 6a12d8f7464567464cea081f258e65d8ad82cd7a3a5533a05533500472540424
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF document exhibits social engineering tactics, specifically a 'ClickFix' attack, by presenting a misleading message about missing Windows 10 icons. It contains an embedded URI pointing to 'xajibur.ru', which is likely used to deliver a secondary payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://xajibur.ru/strik?utm_term=windows+10+icons+missing+on+desktop PDF link annotation
    • https://cdn.sqhk.co/jiloduvunilu/Fiahb5G/minecraft_mods_1._16._3_forge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408601/normal_6003b53069e35.pdfIn PDF document text
    • https://cdn.sqhk.co/titusegik/jia5gf6/thoracic_region_of_the_spine.pdfIn PDF document text
    • https://fanazogi.weebly.com/uploads/1/3/0/9/130969494/kemibobobosi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448556/normal_5fdd444f76ab7.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/6824652.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/SjdhiD3/27369424091.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/X7chfDi/67080177616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_600ad6883bf62.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/c2b7lge/65214773693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5fdc74e129a76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465537/normal_5fc9765fd1041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427085/normal_606176658f671.pdfIn PDF document text
    • https://vanixegufewip.weebly.com/uploads/1/3/4/5/134511125/dogosup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475375/normal_601fcc649c05e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_6047b699bf03a.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/055b38c0-bd04-4fad-8ada-4647ba08738d/logitech_z-5500_connect_to_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3279e556-0973-4391-b056-5a2221b99602/99585799867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/825fb41b-aafe-4d71-9315-f37ad47f0e81/57515926857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5d6cdb-fca6-4bc6-b2cb-a2a542fb45c3/bosch_vision_300_washer_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec7af0a-5b6b-40dc-888b-44fcc4352e78/goxedirupikelek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af17cf70-053c-4614-a0fd-d12dda2d3a80/why_does_my_ac_light_keep_blinking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21992108-597e-422a-ae05-890468fab9d0/mifubabasemavifosigu.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_off0000f204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF204 5420 bytes
SHA-256: a57af67ad6c632050dd90955a125aceac995e8b983e4ef2a25773518b1ad8429
font_01_sfnt_off0001048e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048E 10952 bytes
SHA-256: f37841ca8fe1de2a9ca1b6977c51bd734628a4dc7ce5eae4500dfd9b6e895ce4

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