Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba61f75ffb8a16a7…

MALICIOUS

PDF

68.8 KB Created: 2021-05-27 11:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 538e521991b70c292ac82e87dfa0d3a3 SHA-1: 701f95898222f305e786d55daf56552f82af774c SHA-256: ba61f75ffb8a16a7ac21ff0502a65b40e5e971d147389310a395c18c4d5a8c90
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 0.9998

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://soxebez.ru/strik?utm_term=signing+naturally+unit+4+review+answer+key PDF link annotation
    • https://gebigimudixerez.weebly.com/uploads/1/3/4/3/134374499/2768882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470825/normal_60182fca5c909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_6044d44f091f9.pdfIn PDF document text
    • https://relogeseji.weebly.com/uploads/1/3/0/7/130739887/6026579.pdfIn PDF document text
    • https://riligasiguvenu.weebly.com/uploads/1/3/5/3/135392009/264900.pdfIn PDF document text
    • https://wumaluruporemad.weebly.com/uploads/1/3/0/9/130969386/07fe0186e8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495536/normal_6014bb0642463.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403266/normal_60039551f35e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455657/normal_602e1d8facd7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446166/normal_5fdbadf24d0b9.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/74390b5b-5d71-4a78-a59f-f5efe08c6bc8/42690330900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c07f75e7-eef8-43fc-aaa1-6d969baa247d/will_silent_hunter_3_work_on_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9036c94f-3087-4804-9de0-ed365b43878f/how_to_apa_format_research_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9190e9f-74b1-4794-8dbf-32b59664f3a8/melunelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2bee3a-8f5e-4b78-ac89-11a08d3d06b3/does_stefan_end_up_with_elena_in_the_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b0e4f96-40ea-480b-9869-14c0061c574b/54305677599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06fa4faa-10a0-429b-8d23-b1ac099777c6/what_are_some_examples_of_non_technical_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be9da42-f7b8-4925-824e-560b318b86ab/sanskrit_inter_1st_year_text_book_2020.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_off0000cfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCC 5364 bytes
SHA-256: a26d01d212d46443993d2ea05498092f5cbdeff77c29129091791617d597d66c
font_01_sfnt_off0000e23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23A 10312 bytes
SHA-256: edaaed773a6c693aa472198c3e6f9766f794ee82d2c3d63b4b3af94be914cf5e

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