Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d4cc59806c9afc…

MALICIOUS

PDF

66.8 KB Created: 2020-12-06 02:15:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6f0cb4fa7c55d4cff28f8eb4d76a08dc SHA-1: 32e6bdf7cb3a85b261ed9cf438b8567aad15ed6b SHA-256: b0d4cc59806c9afc3bdb3a53a66924a64e55d13bea33d634130f80a3b60d9d2b
216 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. It uses brand-impersonation credential phishing. 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-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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/kapof-xiladaxexikif.pdf.
  • 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://trafficel.ru/123?utm_term=carlsbad+state+beach+reservations PDF link annotation
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/kapof-xiladaxexikif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5fadd77a98508.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/1300040.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/3799729.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc28f8b40f1034a5cb380cb/t/5fcc080f9aa2de0c647f50be/1607206929327/star_pickets_for_sale_melbourne.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10d36104edf1d77819fbc/t/5fc8317ad17d55300fa4c47f/1606955386134/84125495682.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc528842cf09257bd8747f2/t/5fc5f18d4e98326c02de46fe/1606807949228/57269834010.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ac042e537a05ef314d38/t/5fcc07ab7ae85b53b27db607/1607206828121/jakazu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4fe89d7936484084b407/1606373354481/kero_the_wolf_twitter.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d67b8ef7301f8b106140/t/5fc1f00508845d0924cfda00/1606545414509/p90x_shoulders_and_arms_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f73d1c8c741314321d77/t/5fc9bd96d7c3040d87301c8b/1607056791337/wutisul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d175b41-a64d-433b-aa2a-a3d0029ef378/15412683057.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_off0000c96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96E 5132 bytes
SHA-256: d932ddd41687135384ba773fd9eae47acb8bf372090af0ebf935647eaf53bdae
font_01_sfnt_off0000dad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD9 10444 bytes
SHA-256: 6e89189b6a32863ce38b4248e5388914c098f5eac643e14bb647ff27510d1509

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