Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9a783be2ede1c7…

MALICIOUS

PDF

73.0 KB Created: 2020-12-30 19:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: eaf80ec265576d06b9a3dc83e1263d2c SHA-1: 9de1354118cba80356c65dc24a25ccb7a104448b SHA-256: db9a783be2ede1c743f385e32339adc253db3e6b56383d5d1db9144c7ecf9c1a
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 0.9997

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://traffnew.ru/123?utm_term=no+data+service+temporarily+not+offered PDF link annotation
    • https://cdn.sqhk.co/lisutovudaf/3jgifgg/undead_tycoon_roblox.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/h8hefic/vinupenej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392872/normal_5f9232f5ca2ad.pdfIn PDF document text
    • https://revamimetanezoj.weebly.com/uploads/1/3/4/5/134597499/772459.pdfIn PDF document text
    • https://ketadamofexawun.weebly.com/uploads/1/3/5/3/135349072/2927272.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412378/normal_5fcacb0454e9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_5fa3ad4d56fd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409098/normal_5f99974dd10f7.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/fa2c07f8-45f5-469f-92c8-530540ebfe0d/algebra_2_student_journal_answers_chapter_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b96bc61-7446-41a2-a138-8466bc4e388d/4587083097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e590ad22-6254-4ca0-a58b-3b8fa5f594b3/standard_coffee_table_size_inches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e3d605-30e2-49d9-8034-791390b91226/standard_operating_procedure_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d167b38-5a55-45e6-bb12-6f47e25c6a93/13657464927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ebc39b-508e-4ea5-8496-9b48de715786/80126962446.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_off0000df1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1A 5432 bytes
SHA-256: b7775125997fca2b5ecb9639894d7076b0e7d222638945604eeef64e44df2daf
font_01_sfnt_off0000f195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF195 10972 bytes
SHA-256: 52280c8792f60d14168f1c1dd9d66dcbb34f276688fece62055616e9b527bef2

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