Malicious PDF — malware analysis report

Static analysis result for SHA-256 06bc3a8539c06103…

MALICIOUS

PDF

639.0 KB Created: 2021-04-01 09:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f7ed9c930fc9d7176437b28b53bac723 SHA-1: 56d6eefc422297d9e1431101709c54ef91f6610f SHA-256: 06bc3a8539c06103265852210b037433a8907b0028def86a8cef4e0689111ae3
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, with the primary one being 'https://leonvi.ru/award?keyword=american+english+file+5+answer+key+pdf', presented in a context that suggests it is an answer key. This indicates a likely phishing or malware distribution attempt via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8394

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://leonvi.ru/award?keyword=american+english+file+5+answer+key+pdf PDF link annotation
    • http://potenciy.xyz/shark_professional_steam_mop_s3901_manualqg2sd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_60401237c6f07.pdfIn PDF document text
    • http://tomandbxof.site/rimovatebitigavlzh8a.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/1hfIEhc/dunolekusovomexovakegimun.pdfIn PDF document text
    • https://cdn.sqhk.co/xasurila/eji9uij/bed_sheet_sale_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379971/normal_5fd09b7eda9c0.pdfIn PDF document text
    • http://gagelepapu.22web.org/3644435896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_60435c12921e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415052/normal_6017dc523d726.pdfIn PDF document text
    • http://opit.space/weekly_planner_template_2019bd84w.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/hgV5hiA/car_insurance_cost_california.pdfIn PDF document text
    • http://reetodo.online/cavus_deformity_of_foot_radiology2quip.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/C8gegie/tudivisakozukusebav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_6011d6e9022e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388407/normal_5fc8898f1d110.pdfIn PDF document text
    • http://construt.site/seo_for_dummies_2020_book2simk.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/0e9d26d7-c220-47c9-84da-e9c152a62050/reading_comprehension_mini_lessons_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fbfa16d-08ee-4251-a0ba-c161f4189408/33918076340.pdfIn PDF document text
    • http://jotizazisodeli.epizy.com/what_is_hardware_and_networking_course.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000993ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x993EF 5940 bytes
SHA-256: 69ef953f7659c7751c0227349ee043a325bc21b82c5301ac460d77bd7ad986ae
font_01_sfnt_off0009a819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A819 13492 bytes
SHA-256: d2a76bdb5aaee5b142721203d7a0cf67093fd3a8f144c0dccd9ebba6845415bc
font_02_sfnt_off0009d5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D5D6 16232 bytes
SHA-256: b24653143e2fe272fd4cb9068e5bd150ef3a073b8f7b118090b05474f8286002

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