Malicious PDF — malware analysis report

Static analysis result for SHA-256 07695c4d808be528…

MALICIOUS

PDF

69.3 KB Created: 2021-05-11 12:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d17413306dfbcf8743f67c34d912de44 SHA-1: 1ea72ccc1f0fb38bbcd90557457b4e75cf7cdfd4 SHA-256: 07695c4d808be528852574d12b049a630d06e00d69e7da100fcc63f1a8a4623b
126 Risk Score

Malware Insights

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

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=how+do+clay+pigeon+traps+work PDF link annotation
    • https://gitapizi.weebly.com/uploads/1/3/2/6/132683136/9231948.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/33857226038.pdfIn PDF document text
    • https://navolujute.weebly.com/uploads/1/3/1/4/131483334/5d9b875994.pdfIn PDF document text
    • http://sweetygirl.club/change_din_song_kambiffogt.pdfIn PDF document text
    • http://3203epworthcres.com/peterbilt_386_service_manual3w3yz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_604ca082c39a4.pdfIn PDF document text
    • http://specrazreshenie.com/888261497772503q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457570/normal_5fe04a939ec9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501201/normal_6059ff451bf4c.pdfIn PDF document text
    • https://nozitobolilijaz.weebly.com/uploads/1/3/4/4/134473425/7670191.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/batamim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413362/normal_5fed828782fb7.pdfIn PDF document text
    • https://xevubevisebu.weebly.com/uploads/1/3/4/7/134754503/237e17535.pdfIn PDF document text
    • http://bigowet.xyz/lakiwabuvopodedo4lngs.pdfIn PDF document text
    • http://housefashion.ru/speed_queen_tc5000wn_reviewsnul10.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/dabatisew/dance_performance_program_template.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/xomosiriguvoretofevedezuj.pdfIn PDF document text
    • http://fovawipemezipu.myartsonline.com/vejiga_neurogenica_pediatria.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_off0000d150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD150 5460 bytes
SHA-256: aca82c8d8135f7c7a06b8d3bcc626d415e716ca83e12b62c189275641c62965c
font_01_sfnt_off0000e407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE407 10548 bytes
SHA-256: 82d60daec441807dd0829b45602695fbbf8df86ec376595b856186d3dce873ba