Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eec0678e31876d9…

MALICIOUS

PDF

89.1 KB Created: 2021-02-11 17:33:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: eacce6e5ade0afe83d141ea43b2ab4ab SHA-1: 6b097a805f2f9e6e9200b1453b69180d813de4d0 SHA-256: 6eec0678e31876d95802fd6ba09b12ee1b7bd01bd13f81fe090f46adb8fc0c8b
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristics point towards techniques used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://seumenha.ru/123?utm_term=blaine+county+gta+rp PDF link annotation
    • https://mujolimu.weebly.com/uploads/1/3/4/8/134868529/5121951.pdfIn PDF document text
    • https://ravemazezaj.weebly.com/uploads/1/3/4/8/134885195/xozixus.pdfIn PDF document text
    • https://nixujukasal.weebly.com/uploads/1/3/1/6/131636737/nilarojo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421959/normal_6001942cb5026.pdfIn PDF document text
    • https://resigigemi.weebly.com/uploads/1/3/5/3/135326159/xefogifitonamem-ralibabox-nukalimaje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484834/normal_5fefe525a3dbe.pdfIn PDF document text
    • https://guxitokos.weebly.com/uploads/1/3/2/6/132681611/7569680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369933/normal_6006c5a358e41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384316/normal_6017620e656df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454562/normal_5fe678eac57e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_60113db81dfc3.pdfIn PDF document text
    • https://jafelabuz.weebly.com/uploads/1/3/1/3/131398525/4116183.pdfIn PDF document text
    • http://tavubejidira.iblogger.org/59615808582.pdfIn PDF document text
    • https://zawanudodulir.weebly.com/uploads/1/3/1/4/131452903/563aa.pdfIn PDF document text
    • https://voteriboxovoviv.weebly.com/uploads/1/3/4/3/134352377/xemedanuvexazipi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sametil.epizy.com/method_wheels_fitment_guide.pdfIn PDF document text
    • http://zezajezo.epizy.com/78431882606.pdfIn PDF document text
    • http://xenuduximowub.epizy.com/elite_dangerous_forum_bug_reports.pdfIn PDF document text
    • http://wegajovekesowor.epizy.com/agreement_draft_format.pdfIn PDF document text
    • http://funurebebepoti.epizy.com/71870073805.pdfIn PDF document text
    • http://xatudoxi.epizy.com/advertising_appeals_and_execution_styles.pdfIn PDF document text
    • http://numifugok.rf.gd/java_collections_programming_interview_questions_and_answers.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_off0001202b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202B 5072 bytes
SHA-256: 7ca1ade5b05880850a6db82706e55c9fddaaca40878d458cb4daf805b52e85c6
font_01_sfnt_off0001318e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318E 10944 bytes
SHA-256: a63dce72be532bfcef078a91958fdb26976d53560b027f609ead3d7669399ddc

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