Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d149db93126782…

MALICIOUS

PDF

81.5 KB Created: 2021-04-18 15:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e048e2ad6158b7f6f70d930ee565c140 SHA-1: 52d39675b5e4f7d8560501e4232c39f0341042f6 SHA-256: 27d149db93126782445b05d5f13bb96ef17caf54860ed24d182e7738db7a7312
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9997

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://dugedepap.ru/strik?utm_term=vw+transmission+fluid+change+near+me PDF link annotation
    • https://pofifeluvoka.weebly.com/uploads/1/3/0/7/130739131/86286bbc41912.pdfIn PDF document text
    • http://alcexpress3.xyz/discipleship_teaching_materialscmr0q.pdfIn PDF document text
    • http://cocobuka3.xyz/download_kaligrafi_asmaul_husna8vvzy.pdfIn PDF document text
    • http://trikolor.site/42567657089o63ml.pdfIn PDF document text
    • https://vuvudarekiw.weebly.com/uploads/1/3/4/0/134017261/3027364.pdfIn PDF document text
    • https://peliwotamo.weebly.com/uploads/1/3/5/3/135325711/lurazubasurobuzirubu.pdfIn PDF document text
    • https://vupixesit.weebly.com/uploads/1/3/2/7/132740805/zumuxig.pdfIn PDF document text
    • https://lijokojojet.weebly.com/uploads/1/3/5/3/135333606/9352667.pdfIn PDF document text
    • http://vkysnaya-eda.site/pikisuwekixjahcb.pdfIn PDF document text
    • https://rawubewo.weebly.com/uploads/1/3/1/4/131405976/sinaxiwigonuso_badiruxejitoza_fozoroni_nedamojewuxapax.pdfIn PDF document text
    • http://inscarusa.info/european_society_cardiology_guidelines0qkke.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/fakuguvil/57689145619.pdfIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_e73bebf583bd4f66af2bd6db1da12f23.pdf?index=trueIn PDF document text
    • http://xikisefux.epizy.com/clasificacion_de_la_lactancia_materna_segun_oms_unicef.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_a7167c60398d44c1a301502c656fdf7e.pdf?index=trueIn PDF document text
    • https://17500468-634e-4f48-81ad-48a4a068d6fa.filesusr.com/ugd/dcac76_5cfd0ba9a4d94bb699646f82e759d59b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebaxa/kepuwoluripefiworituwo.pdfIn PDF document text
    • http://mexejuxoxaf.epizy.com/61962517171.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/24260499082.pdfIn PDF document text
    • http://lipidojomodu.rf.gd/alphabet_letters_tracing.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A4 5492 bytes
SHA-256: 3aa4a970baccd90ff1720d358e019db63d4ff4deb53c6d9946250c80f10c1165
font_01_sfnt_off0000fc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3C 11200 bytes
SHA-256: d46316db0ed3597453e4529cc29443ddf2701733dbbf6847a75743a46e913e55
font_02_sfnt_off00012294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12294 16232 bytes
SHA-256: f260341e2deafef282c0cdf6f9547f7c1575836931e00f2cecf0e77490754097

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