Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3c96e9b2e2888a…

MALICIOUS

PDF

74.9 KB Created: 2021-02-19 08:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 06715fa7704680851aa64bb936d9f82f SHA-1: 092b30404cc3f8d3f603f70ac16cf73ca4f377eb SHA-256: 6a3c96e9b2e2888ab5926d7f7e6ebc7b01f46b8e48eccca469ec32d8fceb5300
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://seumenha.ru/wix?keyword=quicksilver+oil+filter+guide PDF link annotation
    • http://summ-ita.space/contacts_icon_png_iosvch99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369796/normal_600315772d032.pdfIn PDF document text
    • https://nakumupapetiz.weebly.com/uploads/1/3/2/7/132741615/xalezu.pdfIn PDF document text
    • http://reduslim-siteofficial.site/vuwamewezoliruwodakuren2rake.pdfIn PDF document text
    • https://dowusezawidi.weebly.com/uploads/1/3/3/9/133997386/mugavusexewifi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447903/normal_5fffab91e70ce.pdfIn PDF document text
    • https://melijavunibujov.weebly.com/uploads/1/3/0/8/130873932/lerek.pdfIn PDF document text
    • https://degegoza.weebly.com/uploads/1/3/0/8/130873855/tekifuwop.pdfIn PDF document text
    • https://wejigewaja.weebly.com/uploads/1/3/5/4/135400860/3834568.pdfIn PDF document text
    • http://my-favshopd.online/645986511765se4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373281/normal_6005e0e34037d.pdfIn PDF document text
    • https://girusidopot.weebly.com/uploads/1/3/0/7/130738876/2f6d683022fd.pdfIn PDF document text
    • https://dulewidojupetor.weebly.com/uploads/1/3/2/6/132695372/mepal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_601e56e45cb09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453537/normal_5ffbd18828ff9.pdfIn PDF document text
    • http://esportzmlevent.com/zorariyjuww.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_60130523da16f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504641/normal_5fedcb4319af5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://witibepav.rf.gd/compliance_policy_statement_template.pdfIn PDF document text
    • http://tininababa.rf.gd/diferentes_capas_que_conforman_la_atmosfera.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_off0000dc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9E 5164 bytes
SHA-256: fb86427dc45ad2f9512d702268a508f806a7928013b925282d0dee2809065ab3
font_01_sfnt_off0000ee51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE51 15112 bytes
SHA-256: 5d946eb652542ef5cfc653a9f0b2aaf989c3dbc4c9f6ce2f8e19b5d66d7baab6

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