Malicious PDF — malware analysis report

Static analysis result for SHA-256 08989e4bac9c1f2d…

MALICIOUS

PDF

94.7 KB Created: 2021-04-18 12:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0bd333a3dc2b960ef0f592922b3a106a SHA-1: 11a57517c8d5d225d1e006a2ee29541f7bae15cd SHA-256: 08989e4bac9c1f2d0c46e4eab80876aada9c8c2328527556ad980f88a468b002
186 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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=weed+eater+featherlite+xt260+gas+oil+mixture PDF link annotation
    • https://dofemavuxowag.weebly.com/uploads/1/3/0/7/130739836/juvaxowo_wawizilibebim_kifidil_vutolomikobop.pdfIn PDF document text
    • http://danetasasanow.iblogger.org/sabbatical_leave_application_template.pdfIn PDF document text
    • http://lulumel.66ghz.com/tipos_de_anemia_oms.pdfIn PDF document text
    • https://sarotokatot.weebly.com/uploads/1/3/2/6/132682281/nulevubavadibi.pdfIn PDF document text
    • https://seguvixezamab.weebly.com/uploads/1/3/5/9/135961197/zumawoxalimeranabiko.pdfIn PDF document text
    • https://patapirebitogi.weebly.com/uploads/1/3/0/8/130814085/9638066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_6040048ec3b77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450519/normal_6050467eb6890.pdfIn PDF document text
    • http://zujonatuvetivux.iblogger.org/what_makes_the_plates_move_brainly.pdfIn PDF document text
    • https://tedisizizifem.weebly.com/uploads/1/3/4/2/134235801/pojerotosujugumin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lilexod.epizy.com/zafekutovopu.pdfIn PDF document text
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_7de11aeab56b4f1db4d168a32523bc09.pdf?index=trueIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_682ea3cbe73c43fe99d4dd74d22b659f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f608203-87b5-49f5-96f0-0c262478212a/38328373829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f17d7c-c900-49ca-aa9e-044a75396902/pedumokop.pdfIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_57e4e8e590834d89a380cb175bc99771.pdf?index=trueIn 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_off00012e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9F 5828 bytes
SHA-256: 71bd7bcc58b723dda731032da1c07df0e720b47ffd8a397664de727c8723cd4d
font_01_sfnt_off00014267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14267 13156 bytes
SHA-256: e091706280e935bd1108e5caa8680131faca3cc635300771f70f8f03de39da9d

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