Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c2ebbdaec69291…

MALICIOUS

PDF

69.0 KB Created: 2020-11-28 08:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 86750c681f1a9ef799d735a4b1d7cb8a SHA-1: 11aa688226fe21078fece01ff44343487f565709 SHA-256: 64c2ebbdaec692911534fdb825f43eea6344e313717e56a1f1393a6864cef5be
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://traffset.ru/aws?utm_term=multiple+allele+inheritance+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469119/normal_5fbeebd2c4253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5fa9551517cd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_5f8c7e662ae28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471081/normal_5fa93b4bcc510.pdfIn PDF document text
    • https://patufefuwo.weebly.com/uploads/1/3/4/3/134312622/xokusiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421770/normal_5fa5e62b25d87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5f9ae9d0c37b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474470/normal_5fc1e6f264e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f8bbb5d0bd53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_5f8c781c426b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_5fa82d7c21728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487194/normal_5fae203348a07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479925/normal_5fbd8eb62701b.pdfIn PDF document text
    • https://sonujesenusa.weebly.com/uploads/1/3/4/3/134344018/8a3968d56cfb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_5f9cbb091fb0e.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/gotijejaj/gastroenterology_clinical_focus.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD315 5072 bytes
SHA-256: b0c18cbd905bb98a9bae63cce3be859d9b8b9702cc16e73c2446487cce78be2e
font_01_sfnt_off0000e45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45D 10080 bytes
SHA-256: 0f7621ed1b03fcc44e4b49226ef33ed6e2b2427bb0115f7b98ed022bc9ad2440

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