Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb70978f691bba3f…

MALICIOUS

PDF

95.8 KB Created: 2020-12-10 13:27:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5ae30bd68e3e8031a55cf0c80d15742c SHA-1: 97be710c0e50283511eb569b02ffe652017feede SHA-256: bb70978f691bba3f7ebd0586a6d47c7b0f1fad4652416de0b3b4906546ec35fd
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 0.9995

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://trafffe.ru/strik?utm_term=2005+honda+crv+service+manual+pdf PDF link annotation
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/juxorijanom_nunak_vopidun.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/xezujuxoz/96895398016.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/pharmacotherapy_casebook_9th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82758332-df1c-4f08-a388-230d7086314d/kuroshitsuji_english_dubbed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db05ac0f-059c-4f9d-b014-c42d90f6e9bd/kawosut.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/coneheads_cast_saturday_night_live.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4e535147b14804299ddd/1606372951506/ruxaruzurig.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/form_no_submit_button_enter_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/aieea._net_icar._org._in_now.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/s_u_bahn_berlin_liniennetz.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_off00012e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E09 5756 bytes
SHA-256: 19ab82b731290ec1928851b375660ad5f415e3ded476e2966dc697894d8de566
font_01_sfnt_off00014183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14183 15820 bytes
SHA-256: 411fbcd7286756183e96264b30b4ae4463fb4475dd7d1573741d0d3ec316ab06