Malicious PDF — malware analysis report

Static analysis result for SHA-256 8964ca226c6c314e…

MALICIOUS

PDF

76.6 KB Created: 2021-03-03 00:33:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 04ce24d259d3442eeef804d156ec3faa SHA-1: a4ef0dd766d1c4c041c23c5dab5aef78aebc2d17 SHA-256: 8964ca226c6c314e9387538525205ad6fb0bbfefc700ee718ad35a6fa5297d3e
156 Risk Score

Malware Insights

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

The sample was identified as malicious by multiple heuristics, including a critical ClamAV detection (Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0) and an ML classifier. The PDF contains a large number of external links, many of which are to unknown or benign domains, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to direct users to potentially malicious content.

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 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://xezojetit.ru/wix?keyword=cross+cultural+risk+in+south+africa PDF link annotation
    • http://snail-case.store/23224054353c5ira.pdfIn PDF document text
    • https://wurivebufe.weebly.com/uploads/1/3/0/8/130874680/7173341.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/gjJhfge/turbo_stars_saygames.pdfIn PDF document text
    • http://dasiroxejipi.22web.org/67477991008.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/jotizifime/center_of_gravity_analysis_template.pdfIn PDF document text
    • http://nezopodadas.epizy.com/nfl_injury_report_week_15_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/12540593681.pdfIn PDF document text
    • http://mepigaruvuj.rf.gd/diablo_3_wings_guide_ps4.pdfIn PDF document text
    • http://vupafigimewex.rf.gd/xelawekogojezokanodekupot.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/tumblr_er_chrome_extension.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/nojepulonolesinilawax.pdfIn PDF document text
    • http://mifijikamipupu.epizy.com/pirates_of_caribbean_movie_in_tamilrockers.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_off0000ef8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8C 4936 bytes
SHA-256: faa2280aeefad834b9a59a0c6191bef8d3b446f852b4bd11c67208f139f4ccd0
font_01_sfnt_off00010051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10051 10440 bytes
SHA-256: d75784decb518e7e0c0851487d417a2f49dfc92d968d6600e733d7a008568588

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