Malicious PDF — malware analysis report

Static analysis result for SHA-256 438c0e3d7146677a…

MALICIOUS

PDF

103.5 KB Created: 2021-03-23 03:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0b5132c85ff3d97d50111bd60f9f5e40 SHA-1: dd4e11e5823d3cafa5fa87582cfa605a2ec9e22a SHA-256: 438c0e3d7146677aa908b80860088c2477be47055d436c10221c1f0823b5a93e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=how+to+assemble+a+sole+e35+elliptical PDF link annotation
    • http://vefaporuzudu.iblogger.org/sisavodusoropadugan.pdfIn PDF document text
    • http://sovetnik53.ru/definition_visual_cultureyh86b.pdfIn PDF document text
    • http://draiwenstore.online/zesinenuzulorasubutortm1uy.pdfIn PDF document text
    • http://onlyforyou.space/kenmore_elite_top_load_washer_dl_error_codeco1jt.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/fC6Nz4f/batesubukejovomenarus.pdfIn PDF document text
    • https://cdn.sqhk.co/tifisizeliz/iiNgdl2/fuxojivefekovusob.pdfIn PDF document text
    • http://vepapin.iblogger.org/buvagigetozezudunilajoji.pdfIn PDF document text
    • http://zujuwasatuler.iblogger.org/beat_pe_booty_song_mp4_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/cKNvij2/warby_parker_appointment_philadelphia.pdfIn PDF document text
    • http://mukoxadetovewo.66ghz.com/bitdefender_total_security_offline_installer.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/714e2ac0-20de-4186-9cf5-6bc43195c7c0/service_schedule_vw_tiguan_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a8c657-4233-4c14-9d85-297c013b3e5b/free_wordpress_hosting_comparison.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/pevotojirobe.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/89517297937.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/kemivofewexaw.pdfIn PDF document text
    • http://bitines.myartsonline.com/zanitula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe91584b-6666-4422-8fe6-39930224f73b/cyberpower_cp1000pfclcd_ups.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5333fa0c-ed19-4bed-8955-a6c1cef890c0/100_common_spanish_words.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/8756370413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48e69ac1-9d30-4b73-a433-59411872b8bc/tagurap.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000157f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157F0 5464 bytes
SHA-256: 115a8e7f9687e8879399d9787e4cfadd4c8518f2980c9e21a57ab7c7cd165e5c
font_01_sfnt_off00016a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A85 11212 bytes
SHA-256: f793e21d4cdace90f9d29c624cd670fad8ae6cf202372274c2ec6225ec200d36

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