Malicious PDF — malware analysis report

Static analysis result for SHA-256 036060631e3d0f40…

MALICIOUS

PDF

80.1 KB Created: 2021-03-12 02:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 09f02ff1c5ed0fd3a9d7fcf28793e37e SHA-1: 536a64a4ec13858eb1eec64212bac3a1fe5acb0c SHA-256: 036060631e3d0f4080f4499779dc59af22a87ad653f3c8d8d1d541c9b6441b60
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-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://vilenefex.ru/strik?utm_term=primeros+auxilios+para+un+ni%25C3%25B1o+que+se+ahoga PDF link annotation
    • https://cdn.sqhk.co/nosasawup/hgi1SH1/balance_sheet_accounts_receivable_net_income.pdfIn PDF document text
    • https://cdn.sqhk.co/rinilafexowi/gretjgr/25538006456.pdfIn PDF document text
    • http://copalofa.site/putijanenapevalozipsq542.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/9gehThh/reridoxax.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/gXhghaa/48774460582.pdfIn PDF document text
    • http://taxezobojoxa.iblogger.org/lemuvakegawizatexolipefir.pdfIn PDF document text
    • http://zootime.store/17530148828vm3l8.pdfIn PDF document text
    • http://tdsevsvet.ru/wokuguterovedevixipumuvxtl1v.pdfIn PDF document text
    • https://cdn.sqhk.co/japanakoga/jhWhboz/68847776877.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_9d59518ecd454aa785b8c40a32181136.pdf?index=trueIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_76720cb4ef0245579f6de2b7705bcab5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinezedu/moment_format_current_timezone.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/emphasis_added_mcgill_guide.pdfIn PDF document text
    • http://vawujularow.rf.gd/tarejonodamupexez.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/puxuvitupuwolemuwop.pdfIn PDF document text
    • http://roxudafemif.epizy.com/facebook_profile_frame_template_free.pdfIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_d7b071cd06734b46b325cae1e547a431.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/what_should_the_tension_be_on_a_singer_sewing_machine.pdfIn PDF document text
    • http://jedasajel.epizy.com/tiger_rice_cooker_manual_jba.pdfIn PDF document text
    • http://laboluvimaniraf.epizy.com/bob_s_burgers_season_8_episode_guide.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_off0000f776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF776 5640 bytes
SHA-256: d693ef66529a5169a4e2d92cbeb9f1c193beeb25a79636130cd11b7b18f836e6
font_01_sfnt_off00010a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A31 11696 bytes
SHA-256: 0123cac2e8f88a2609807c32faff735b1766c1019019dfb73d131f39b1fb1967

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