Malicious PDF — malware analysis report

Static analysis result for SHA-256 db72213e720c8b47…

MALICIOUS

PDF

65.7 KB Created: 2021-02-22 15:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 79bf3f58c3a1bdf99af751c1b8ff3e48 SHA-1: 1aac8902ef8518663d809e6545a8cf7d7371d159 SHA-256: db72213e720c8b47587560cd0468156024c043bd563037f30390b5a1f665737b
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://baarspo.ru/wix?keyword=mercedes+c300+manual+2019 PDF link annotation
    • http://contact-git.top/pelicula_diario_de_motocicleta_completa_en_espaolx4jmz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366625/normal_6004a11b69617.pdfIn PDF document text
    • http://rollernefritmassage.xyz/sederenogji.pdfIn PDF document text
    • http://lunamawel.22web.org/mudize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_601331185e756.pdfIn PDF document text
    • http://gratoram.site/dragon_age_origins_blood_mage_guidenzdjx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401559/normal_600c593865ed1.pdfIn PDF document text
    • http://magicwoolshop.com/86555166242xt3rr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470967/normal_602caf793bceb.pdfIn PDF document text
    • http://fruit-ital.space/fotalazisixiwopinipopowanebrmx.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/jodabiladezot/73110396991.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/islamic_calendar_2018.pdfIn PDF document text
    • http://fezitemepu.epizy.com/23963150591.pdfIn PDF document text
    • http://buwebone.epizy.com/mail._ru_group_annual_report_2017.pdfIn PDF document text
    • http://gigavolaxo.epizy.com/83110889749.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/how_to_set_up_xfinity_wifi_hotspot_on_ps4.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_off0000c3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D5 5736 bytes
SHA-256: 72515a817583d3f678b3f1605206fa1d345619b3bd34485e1da6b4892c4e6598
font_01_sfnt_off0000d749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD749 10396 bytes
SHA-256: 11b4b52850d4a068c28e9a9c5fe17fbce42bc4ff4bb0efca8971f41e141b2134