Malicious PDF — malware analysis report

Static analysis result for SHA-256 271b817312bab7a4…

MALICIOUS

PDF

76.6 KB Created: 2021-04-29 01:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c1059010b4ea168ea967e20e46b00f9e SHA-1: 16ebf468e35ac6de28918a7cc07a90c651156148 SHA-256: 271b817312bab7a4a21254ab2204f8c2a97c7a8e5d8650193979088fb360ee79
156 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 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 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.
  • 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://nipisod.ru/strik?utm_term=toro+self+propelled+lawn+mower+model+20334 PDF link annotation
    • https://cdn.sqhk.co/genamudazunu/e0jKKia/vutegunikegaruruxebovab.pdfIn PDF document text
    • https://cdn.sqhk.co/lekifuwixal/Ms8Hifn/32390755053.pdfIn PDF document text
    • https://fajupumivut.weebly.com/uploads/1/3/4/1/134108914/degafumeg.pdfIn PDF document text
    • https://lujiwosibe.weebly.com/uploads/1/3/4/0/134040634/xativ.pdfIn PDF document text
    • https://sugokumorol.weebly.com/uploads/1/3/1/4/131437576/fodamu.pdfIn PDF document text
    • https://gojanaribebiw.weebly.com/uploads/1/3/1/4/131437307/xopobosuxawel-latazazuxalodon-jalukar.pdfIn PDF document text
    • https://tinabatof.weebly.com/uploads/1/3/0/7/130776088/gapun.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/jEihvgj/47809380493.pdfIn PDF document text
    • https://munulokepopat.weebly.com/uploads/1/3/5/2/135297381/1073779.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/jhfiahc/30044107946.pdfIn PDF document text
    • https://wumudirega.weebly.com/uploads/1/3/4/5/134515906/1777184.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/bezutu/how_to_measure_process_cycle_efficiency.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/wolisewuf.pdfIn PDF document text
    • http://duguzikazom.rf.gd/85329732450.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/interim_financial_reporting_manager_jobs.pdfIn PDF document text
    • http://furoteza.rf.gd/welebedilogox.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/bozarifarirusefe.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/how_to_turn_off_blue_light_on_xfinity_box.pdfIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_203e64ab1749427db410db36f363887e.pdf?index=trueIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_7401b92305974974b6db5c81b92a7fe6.pdf?index=trueIn PDF document text
    • http://vikituluw.rf.gd/cambridge_igcse_combined_science_student_book.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_off0000ec60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC60 5752 bytes
SHA-256: 9ae877fcf3986881647f0ef908bf4dc28da1cc269a9028c06e7414094e96dabb
font_01_sfnt_off0000fff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF8 10908 bytes
SHA-256: a52b08102b13f45376a7bd60316be50dc3f93bd1e1a95e452b8908ba7c923823

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