Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a26879507f28eb1…

MALICIOUS

PDF

104.8 KB Created: 2021-03-23 02:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5245d1840b1ce3b86ebe9bb85f10970f SHA-1: 70c0489bae196c2a32c84bbe696ded387ef70cc0 SHA-256: 1a26879507f28eb1c5280e85882f0c892c8d250847e86fe0d8c8b62c0ae7c49a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to 'xezojetit.ru'. This, combined with the ClamAV detection and ML classifier flagging, strongly suggests a malicious intent, likely phishing or malware distribution. The document body, though partially corrupted, contains text related to search queries, indicating a potential lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=what+is+a+mythical+creature+called PDF link annotation
    • https://jadegivi.weebly.com/uploads/1/3/4/8/134851053/lurudomigimojax.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuluxaja/gjD0hgj/95034584872.pdfIn PDF document text
    • https://jujizifij.weebly.com/uploads/1/3/4/3/134309807/zilasarogipawagogu.pdfIn PDF document text
    • https://sujanumijixedi.weebly.com/uploads/1/3/4/5/134501714/mozediwalejilumub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457586/normal_60561fd2dd758.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/hcSgeif/45983401948.pdfIn PDF document text
    • https://cdn.sqhk.co/lapitobexeva/VMjeThc/kudopibo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381759/normal_603853b680722.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505699/normal_5ffe910d60c0d.pdfIn PDF document text
    • https://cdn.sqhk.co/sobetevod/id56jdT/toxovofuzelixu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/jopok.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/tozerazatuwujufajorap.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/86400081271.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/car_key_programming_course.pdfIn PDF document text
    • http://puxedevonizu.epizy.com/galvin_at_windows_michelin_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/52435503232.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/standard_grievance_procedure_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/draw_operation_in_sheet_metal.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/56392752957.pdfIn PDF document text
    • http://jojudodadanu.epizy.com/dell_e7450_launch_date.pdfIn PDF document text
    • http://gitogopafo.epizy.com/blender_2._8_64_bit.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_off0001511e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1511E 5292 bytes
SHA-256: 998db62b219dfa0fbc1274caee2e2c50f0de19ef38f672fabd6d1ed491e3067e
font_01_sfnt_off00016304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16304 17312 bytes
SHA-256: 62a0e2d06703db3f2ccd14435c79abd6e36b919a992e1e0822217b20cc401a80

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