Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c69a178512a7f70…

MALICIOUS

PDF

69.2 KB Created: 2021-04-06 21:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d0a05b2da301f6b67406116427679987 SHA-1: b0f0fed1d0b350a535c088810d17f1d5a5f63e51 SHA-256: 6c69a178512a7f703aad1c2cc248d10c465975ee9cb6aa259be617d71cf0ea16
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=get+file+from+assets+folder+in+android PDF link annotation
    • https://cdn.sqhk.co/tememukafosu/jd5jbMV/english_dictionary_offline_livio_apk_download.pdfIn PDF document text
    • https://kobuzefejara.weebly.com/uploads/1/3/1/4/131437799/8884198.pdfIn PDF document text
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/fezarejoxufuzopif.pdfIn PDF document text
    • https://wolapegod.weebly.com/uploads/1/3/0/7/130776073/saluwupe_tezune_nogov_rigelob.pdfIn PDF document text
    • http://wikowezenitezo.medianewsonline.com/90096938356.pdfIn PDF document text
    • https://cdn.sqhk.co/zaweniwefi/fJm63wQ/didion_milling_explosion_cause.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385202/normal_5fe8e38b60722.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/44e050ad.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/hc4jbic/11272488149.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451355/normal_6007b2fb1ec30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492892/normal_5fccc3bf97c6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5fd1b32c635ae.pdfIn PDF document text
    • http://mibijuzorifif.getenjoyment.net/53094691589.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/gidibesuxi/55222862395.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/calendar_2020_excel_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/44153752393.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/template_iphone_xd.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/nike_air_force_1_womens_sale_australia.pdfIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/mckinsey_case_study.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/area_of_parallelogram_worksheet_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/storyboard_template_for_word.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_off0000cf3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3F 5084 bytes
SHA-256: b6e006dd1ebd95caec7093126f65b730f1167579813354ec23d636419d0f676c
font_01_sfnt_off0000e06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06E 11416 bytes
SHA-256: d272188bc89f3f1aebe000dc7b222380a9dc6534f2fb2145912b8899a5529d85

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