Malicious PDF — malware analysis report

Static analysis result for SHA-256 399e79e9460b9275…

MALICIOUS

PDF

66.5 KB Created: 2020-11-20 17:23:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: af24b1000514cf1b7b6c3f889e178637 SHA-1: d1b4474f09b77a203cd888a3b5dea4d28e59c6cf SHA-256: 399e79e9460b9275c49f02a2265ab176a87e8998d6e0bff152566ac44b3f5419
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://traffine.ru/aws?utm_term=word+flowchart+template PDF link annotation
    • https://tajusubinem.weebly.com/uploads/1/3/4/8/134886452/485325.pdfIn PDF document text
    • https://vekoliro.weebly.com/uploads/1/3/4/4/134482952/efb99c9163c.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/gumililov_fowij_lizonezokal.pdfIn PDF document text
    • https://gukenefekofuga.weebly.com/uploads/1/3/4/5/134588358/vajubazorinew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_5fa26b2eec1c5.pdfIn PDF document text
    • https://paboludozov.weebly.com/uploads/1/3/4/3/134333588/bf3a62c.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1441493.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/rujawagot_vefoloxe_wuxapinofi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c34e807-bb9f-4777-8db1-34ee21a6f369/44167812034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c4b5f96-4dfd-42fa-b658-994a6d1ca499/2073781787.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/ronufifoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8185c20b-ed03-4970-a096-d68f77c558f6/xupuzilanawiwodif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b456096-d1b4-4337-99f1-0e50ccb2bff6/wodomuf.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_off0000c902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC902 5324 bytes
SHA-256: ad5dfb3efccd071d739f7d77654faa037f67cc6553e7c56a8facd63fb49cf0c9
font_01_sfnt_off0000db0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0D 10724 bytes
SHA-256: a09f1fbec70b68a11e328066228652f057ed1419c3bd159fd51f6ce4ee4cfbfd

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