Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4dc7b1f8868746a…

MALICIOUS

PDF

75.6 KB Created: 2021-05-31 08:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7ca3869084cc4505aaed48223f250255 SHA-1: 6b82770aaad8f77414ad53ac086eb962efe33aa6 SHA-256: d4dc7b1f8868746a8c91433d75cbd56a357ed913b47547135b258e9a3a2f3c9a
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 0.9999

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.
  • 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://dafemum.ru/wb?keyword=dewalt%20dcd771c2%20budget%20cordless%20drill%20kit PDF link annotation
    • https://rijejoxutozi.weebly.com/uploads/1/3/4/5/134599637/8d049da.pdfIn PDF document text
    • https://garaxawodipadi.weebly.com/uploads/1/3/4/5/134595678/xudabopukef-xajama-rewutume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389355/normal_5fd7971b36455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5fd34075accee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482002/normal_5ff8edbe54b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_606266dbcb4d5.pdfIn PDF document text
    • https://botugesoxa.weebly.com/uploads/1/3/4/5/134509905/mavatogiwabimefusiza.pdfIn PDF document text
    • https://babixugopanodip.weebly.com/uploads/1/3/5/3/135382952/xulexob.pdfIn PDF document text
    • https://sirakogosi.weebly.com/uploads/1/3/4/6/134600403/362863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_605d9b28dbef7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469103/normal_606e922f8de8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_606b43b202d60.pdfIn PDF document text
    • https://fagedanagaga.weebly.com/uploads/1/3/4/8/134876409/94a8894.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/e2c4d84c-8655-40ae-8d57-edaf9350c88e/zoxumagupetanogeki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/152b4e12-fcfe-4ec4-89dd-f9412d1d2d65/how_many_atoms_are_there_in_a_compound_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c783e88-c2e3-45ff-b527-7782d383a752/buying_and_selling_annual_leave_tax_implications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea4d702-300d-4a3d-a474-57a54d056909/lord_of_the_flies_unit_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bedb88e-1511-4156-acf2-b5e673f64ee5/4197490039.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_off0000e8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A1 5664 bytes
SHA-256: 4b4b7dfa7fc33564a8a3a3eabc1e02b0b1fddad21df1cc43391f0556342aad08
font_01_sfnt_off0000fc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC29 10876 bytes
SHA-256: 5c49742039f4e46f37f3bf499849d920f196dd3c06fe43a630a093384d5f19e3

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