Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea69a85ca325d185…

MALICIOUS

PDF

72.0 KB Created: 2020-11-16 23:05:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3bfdf5040efbe9f5046c810dca8bd20e SHA-1: d8c397e86d0943d813e77c93afd0a508632bd33a SHA-256: ea69a85ca325d1851fc36504c7721f9d0bc09df0e12d911b34be9ee26d5bd5d4
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 0.9998

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.
  • 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/strik?utm_term=12+angry+men+character+analysis PDF link annotation
    • https://vimefipivarek.weebly.com/uploads/1/3/4/3/134310944/weguzufululis.pdfIn PDF document text
    • https://kuguzozivef.weebly.com/uploads/1/3/0/7/130739994/5b8f22a00b.pdfIn PDF document text
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/wetaxamobukokejov.pdfIn PDF document text
    • https://rovuvarerupe.weebly.com/uploads/1/3/4/6/134644041/2607479.pdfIn PDF document text
    • https://finivoxub.weebly.com/uploads/1/3/4/3/134387593/6049e5478d24089.pdfIn PDF document text
    • https://sububavujowiv.weebly.com/uploads/1/3/4/4/134460245/zurasigukodibo.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/ea4c72f3-10b0-4873-ac14-999d5c0190df/71231923115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b71d9a-0e3b-4cec-9c05-94d7aa9adf97/john_deere_7000_corn_planter_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42f0f798-8d47-4109-9f4a-18c83876234e/assamese_dictionary_hemkosh.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/william_shakespeare_sonnet_18_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a29798-5ec1-465d-9e28-c687271e85a4/luvutaduwametuzisira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8487370e-e91a-4ec5-a8c1-20a5a692bf50/guwotedujimup.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/19841925447.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D3 5404 bytes
SHA-256: 3be990332d29ced10c5550a1d705f678698a8aeb7b26b80154dabb5888d69ddc
font_01_sfnt_off0000e412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE412 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0000ef75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 10540 bytes
SHA-256: 58a8bd7980d7cba1b0c757465947bb81f967e4c65730a65d5b0fbd3cdc76a411

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