Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f63b7b3baac2ec…

MALICIOUS

PDF

75.9 KB Created: 2021-03-14 13:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0d7b2c32cdf279f859c675dfb4bed2b0 SHA-1: 62f170afc33fb2538a34cf79ade6726c94d2a708 SHA-256: c2f63b7b3baac2ec84704fc05fc9e818fbaca52899ea490a30225c0e8524f863
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, characteristic of a link farm, designed to redirect users to various websites. The document body, though heavily obfuscated, appears to be a lure related to research, likely to disguise the malicious intent of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=what+is+the+purpose+of+an+aide+memoire+in+research PDF link annotation
    • http://xuwurexem.22web.org/tom_clancys_the_division_2_3djuegos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_60181e5fc236e.pdfIn PDF document text
    • http://online-bestshop.xyz/39997135691sj9k6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_603757fe667e2.pdfIn PDF document text
    • https://lezafopiga.weebly.com/uploads/1/3/4/6/134628758/4165716.pdfIn PDF document text
    • http://medyahanem.com/college_basketball_coaching_jobs_in_georgia835rb.pdfIn PDF document text
    • http://future-techno.ru/janudaribixaxoo87wi.pdfIn PDF document text
    • http://bravos-kids.ru/totaline_thermostat_p374iucio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498348/normal_6040502a19027.pdfIn PDF document text
    • http://steblin.pro/m_audio_keystation_49_dimensionstgz8k.pdfIn PDF document text
    • https://tawusizigegik.weebly.com/uploads/1/3/3/9/133997505/wisenogigu.pdfIn PDF document text
    • http://newberginvestmentproperty.com/instruction_of_amenemopeo6rlm.pdfIn PDF document text
    • http://esportzmlevent.com/medical_case_report_formatufn7x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469640/normal_60173b053a144.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/dalava/64141660517.pdfIn PDF document text
    • http://remavolef.epizy.com/iqiyi_inc_annual_report_2017.pdfIn PDF document text
    • http://luselobek.epizy.com/55843337561.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/52699694180.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/nutupigafidezepeketusam.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/17830158523.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/estimation_worksheets_for_6th_grade.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_off0000e777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE777 5376 bytes
SHA-256: 947aa7f50c5776abf527141536f793a738c85938522e7cfd69d6cf8fa191d7b9
font_01_sfnt_off0000f9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A2 11452 bytes
SHA-256: 5378ef1f67d0b06a021d11b0786abb61a98c917942bb312aee3f4d847035ecd4

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