Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca000610591e79bc…

MALICIOUS

PDF

72.2 KB Created: 2020-11-26 03:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ef163e9a3b4ff65d6597ce528b050077 SHA-1: 7037ded3c37928cfef5c2656660adb89738eacad SHA-256: ca000610591e79bc7707dc5ddd57814b905cd95c2246b4d47ecb2abfa9c719c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, with one prominent URL pointing to 'trafftec.ru'. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host numerous external links, potentially to manipulate search engine results or serve malicious content. No scripts were extracted, but the presence of external links and the nature of the heuristics suggest a phishing or malicious redirection attempt.

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://trafftec.ru/123?utm_term=the+perfect+pistol+shot+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420610/normal_5fb6d0aebf749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5fa38bc47b79b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461481/normal_5fa4d391c630f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f8f3555df92c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419003/normal_5f9be34d9ba6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_5f9a9aa1d3139.pdfIn PDF document text
    • https://mojipolizu.weebly.com/uploads/1/3/4/3/134318612/silajifirene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419640/normal_5fa6fdec34432.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d547fc46-3519-47d8-9ad6-41705479501e/56694436235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d3538a2-b684-4ed4-9dde-115714dc3bcd/lurgio_middle_school_landing_page.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d57999-25cb-45c1-b0b6-7f5a6e8239cb/sejusifenizawurekow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/241e62d8-20a8-415f-9fd0-0df14bb8f0a1/filmes_online_gratis_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b921026b-2673-4e93-aa5c-940c98a6b9f2/72817002988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecaa4238-7556-418d-bd8a-995de2c8c6a8/67485383014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e818d6-42ea-48dc-b9f7-e8364dc9bc1c/83856310331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca9c3b1-4683-4d8f-ac92-ef7f4bde6df5/ketitulitatibur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b518d02-8d51-49f9-b341-6abbc60a46ae/76772341342.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB2 4664 bytes
SHA-256: 6585dd382a9da24b52e0c08d9a90b3a2c7c8bf992205c9e5a929d2dd8aca37b3
font_01_sfnt_off0000de9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9F 11508 bytes
SHA-256: c8e2581e2ac1040d81e414e8e9880d18e8f8d1c009b0a64e886c605f404c3a0a
font_02_sfnt_off000105ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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