Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f6f3df4be8afb9…

MALICIOUS

PDF

77.7 KB Created: 2021-05-18 18:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b48a732df0cecd245277e4dbafcbf972 SHA-1: 58032b069ee0976b92a5b8dc45fe847fd0d57722 SHA-256: 67f6f3df4be8afb9ebe259165b38e90c082050fec6c392f787227066ea31cd46
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 0.9998

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://botokaw.ru/strik?utm_term=defiende+a+su+novia+y+lo+matan PDF link annotation
    • https://bevarepovorumi.weebly.com/uploads/1/3/2/3/132303359/47e03e.pdfIn PDF document text
    • https://bipuvoru.weebly.com/uploads/1/3/5/3/135336843/fevemaretu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_604dad4e6a902.pdfIn PDF document text
    • https://malilojomatade.weebly.com/uploads/1/3/4/3/134354128/fozigajarikatij.pdfIn PDF document text
    • https://vemakovuzabomon.weebly.com/uploads/1/3/4/8/134881214/7759182.pdfIn PDF document text
    • http://sesosorav.iblogger.org/ruwowejulilogodutituf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461744/normal_603c641cbc285.pdfIn PDF document text
    • https://gipadakox.weebly.com/uploads/1/3/4/8/134884067/9781568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446499/normal_602470b6850a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_60118cced354d.pdfIn PDF document text
    • http://navomupalizo.iblogger.org/simple_startup_business_plan_template.pdfIn PDF document text
    • http://zuzigokapun.iblogger.org/remedies_for_breach_of_contract_south_africa.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/tabobujimo/evenflo_stroller_wagon_gypsy.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/35507806181.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/doduwarotap.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/ashton_manual.pdfIn PDF document text
    • http://vinudade.rf.gd/check_balance_sheet.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_off0000f3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EB 5120 bytes
SHA-256: 01f3f6f8dd88f5854aa169d4b37142928d260cba065ae8ec041e1960e82470ba
font_01_sfnt_off0001055e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055E 11272 bytes
SHA-256: 9339b47b5d6d55f65509697d80d5a2bcf8030f28cf66b62456e7636ea67aea89

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