Malicious PDF — malware analysis report

Static analysis result for SHA-256 e51e0690fbb5eae9…

MALICIOUS

PDF

76.1 KB Created: 2021-02-23 01:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 92cbb1cdb1354121e2025e0e4fd5e744 SHA-1: 9f7b0217625af191d4a823be7ac4b7b9acad74ca SHA-256: e51e0690fbb5eae9807330092ee1fab45593c12fff0b1a798cff137c22839548
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm on disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/strik?utm_term=international+s1700+dump+truck+for+sale PDF link annotation
    • https://sakurulemiba.weebly.com/uploads/1/3/0/9/130969926/loribag.pdfIn PDF document text
    • http://mastera-saydinga.ru/converting_between_fractions_decimals_and_percents_worksheetbgxcc.pdfIn PDF document text
    • https://nizevamil.weebly.com/uploads/1/3/2/8/132814567/aa2f1a27.pdfIn PDF document text
    • https://rosanibo.weebly.com/uploads/1/3/4/8/134873488/4498010.pdfIn PDF document text
    • http://qupieasy.online/lisosaparemefegt1h2o.pdfIn PDF document text
    • http://pokulumaj.iblogger.org/80080492239.pdfIn PDF document text
    • http://soldonlakewood.com/dusoborogafujijopineji7tkol.pdfIn PDF document text
    • http://fipevowes.iblogger.org/kaven.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bugifub.epizy.com/66393731155.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/princess_diaries_book_series.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/soworozibipelo.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/59179745720.pdfIn PDF document text
    • http://fogalefudomuj.epizy.com/18111660972.pdfIn PDF document text
    • http://vowonedof.epizy.com/proving_congruent_triangles_worksheet_with_answers.pdfIn PDF document text
    • http://legekiwogitevil.epizy.com/74668711331.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/94369460845.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/potegutorejoguzi.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_off0000eb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB59 5576 bytes
SHA-256: 492d582737f10a38f859012868fba8465b5e177929152de6bda973739f3db1b8
font_01_sfnt_off0000fe43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE43 10796 bytes
SHA-256: 7c7f04426a47f4c674dd699c97b1bb4836873a1bfb64901fefed2bbde950ff1a

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