Malicious PDF — malware analysis report

Static analysis result for SHA-256 db701f9533a71fcf…

MALICIOUS

PDF

127.4 KB Created: 2021-02-17 06:12:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7f1ffb174c3b197eca358edfe0655b9f SHA-1: 731a9cd62acccec1cb5f5c53d36e4ed36700b43b SHA-256: db701f9533a71fcfa7e5e3aa588cfdc35823a66bad4d6eccf7a7c8d20153b03b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards techniques used 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 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://leonvi.ru/aws?utm_term=what+is+the+top+selling+beer+in+the+uk PDF link annotation
    • https://cdn.sqhk.co/dixufeja/o4jbniE/hide_text_messages_app_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/ropikenetu/ijibidp/tiny_home_builders_deland_florida.pdfIn PDF document text
    • https://botiwugagow.weebly.com/uploads/1/3/1/8/131872238/gezapazuwebagag.pdfIn PDF document text
    • https://jipuziloki.weebly.com/uploads/1/3/2/6/132695969/184269680468d67.pdfIn PDF document text
    • https://cdn.sqhk.co/forexajepusa/eU0hhf1/19361932969.pdfIn PDF document text
    • https://rakulemiz.weebly.com/uploads/1/3/2/6/132682689/dadojukulalusiti.pdfIn PDF document text
    • https://joxenunufob.weebly.com/uploads/1/3/1/6/131606789/zibetuxazuniw.pdfIn PDF document text
    • https://rebopugosoge.weebly.com/uploads/1/3/5/3/135346619/finapelabu.pdfIn PDF document text
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/1438928.pdfIn PDF document text
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/6af34a.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/sirazowa-kikakoseposu-wologofariz-jateduweku.pdfIn PDF document text
    • https://punufepezakuba.weebly.com/uploads/1/3/2/7/132740965/kisowijutupuwod.pdfIn PDF document text
    • http://xtw2.club/93020955694peozc.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/lomuper/nivugadu.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/16603004859.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/bms_full_form_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/33223327992.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/2015_toyota_avalon_limited_manual.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_off0001b4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4B9 5296 bytes
SHA-256: ff0d1b94d773ef4a6e04e309cdd150065b33ec42ac31815ade941527e04b11e1
font_01_sfnt_off0001c6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6C4 12364 bytes
SHA-256: d813724f371ed35e627207d6e035ff907183258cbb179e9aff9a39dd1683d70e

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