Malicious PDF — malware analysis report

Static analysis result for SHA-256 e030e8b525e62a98…

MALICIOUS

PDF

75.2 KB Created: 2020-12-19 21:57:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9a1f7bef3808aaa6cafdfb9f2a652d6e SHA-1: 84c06ef09deef06781c6e99989cd8bf1fab14bea SHA-256: e030e8b525e62a98c57dab48ff2bfb9e057d70be70328b83c8d0ffedd5ffff72
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://trafffe.ru/strik?utm_term=civil+liberties+vs+civil+rights+worksheet PDF link annotation
    • https://mebitulipavore.weebly.com/uploads/1/3/4/3/134339985/dixoje.pdfIn PDF document text
    • https://bomaripuxizidul.weebly.com/uploads/1/3/4/9/134901287/nakod_wivorasedajoxo_mamil.pdfIn PDF document text
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/2070020.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/78aa168b.pdfIn PDF document text
    • https://zakiguranul.weebly.com/uploads/1/3/4/4/134480990/xigipawujo-zuwabu.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/feseni/92953711557.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/bedepi.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/boatus_course_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/angular_template_free_github.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/88078697878.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc002e7e5c7695ca996b6a8/t/5fc19dd1f3de5e49b5a19a32/1606524370078/leonardo_da_vincis_codex_hammer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc79b839866a15ab3def02/t/5fdced31e80c450cee367fba/1608314161414/buy_side_equity_research_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/personal_budget_spreadsheet_sample.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_off0000d406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD406 5112 bytes
SHA-256: ba19f8ef2686c3dfd2f13a5759375aab8fc86e27642762b7032ceb9b4f75b6e2
font_01_sfnt_off0000e578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE578 10480 bytes
SHA-256: c9d1f1cf2b268bb041d4152e6ef386f426dbc3618990ec4d2be185b392129d26
font_02_sfnt_off00010999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10999 16328 bytes
SHA-256: 7dd26fd8dd27fd32cdfc6bf8ef2f70b6278016848e08eca58648cb972bc49ca8

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