Malicious PDF — malware analysis report

Static analysis result for SHA-256 170d065aeb1a176e…

MALICIOUS

PDF

78.9 KB Created: 2021-02-12 19:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 08f76b2ecdc2bd821ef963fcc5f8688e SHA-1: 2084e3a8bf631168445aaec716d92bef13528dd5 SHA-256: 170d065aeb1a176e552bf9c66ae74d3050ab913ca88f8e36a5e596e38e253f5d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable domains, which is characteristic of SEO spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious content or exploit kits. No scripts were extracted, but the PDF structure itself is used to host a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://seumenha.ru/wb?keyword=canticle%20of%20the%20sun%20music%20sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482009/normal_5fe6cb9d80069.pdfIn PDF document text
    • http://lixanijet.iblogger.org/40058536239.pdfIn PDF document text
    • https://cdn.sqhk.co/businaxidare/cGQWSgd/gegemosazulopek.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/3424861.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/gfje1ih/basketball_champions_league_team_budgets.pdfIn PDF document text
    • http://vefaporuzudu.iblogger.org/final_fantasy_13-_2_fragment_skills_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/aMji7sT/43621343115.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/fz9hfYm/arkham_horror_card_game_card_list.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/bagexex-zobifunavelufu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wajibile/baillie_gifford_shin_nippon_plc_annual_report.pdfIn PDF document text
    • http://rubaporejolo.rf.gd/scarra_item_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/car_crash_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/sepsis_guidelines_repeat_lactate.pdfIn PDF document text
    • http://dizoran.epizy.com/control_system_design_guide_4th_edition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDD 4932 bytes
SHA-256: 49ecf2ee35bcef80ed2f715b71b4cd39238a37a45950cdd6189e0bf831540719
font_01_sfnt_off0000fd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 10244 bytes
SHA-256: 7cfa2b13c0ca18a11d322c069245ca8006ddb4eec2742c9f40e714ba05e90968
font_02_sfnt_off0001208f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.