Malicious PDF — malware analysis report

Static analysis result for SHA-256 75eb291e8ff626ec…

MALICIOUS

PDF

74.1 KB Created: 2020-11-11 14:21:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cd56fbb78e81622279764078097a1f7e SHA-1: 990ad5d37c5cf0d1b743049df9e4d207ede6ce82 SHA-256: 75eb291e8ff626ec148fd05d20bd84c73581c171b246a2fbc9484b2b5981402f
214 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 and routes users through malicious redirector infrastructure. 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=takaki+a+different+mirror+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379970/normal_5fa1b76a32bbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449987/normal_5fa4a11252990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f8f59eb879b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f8e223b92843.pdfIn PDF document text
    • https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/bamemofoporex_nonafugudabesu_zefopabujonoru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480735/normal_5fa70be554aae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_5f9b59b22b0fa.pdfIn PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/delekoxezuzobuko.pdfIn PDF document text
    • https://jobikituloxexe.weebly.com/uploads/1/3/4/4/134456837/ea524a11a1.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/miguzugunuru_zakonapuwomemos_subazeva.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://s3.amazonaws.com/nazekisigiduz/activities_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/xebareto/44395944562.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/simulation_modeling_and_analysis_with_arena.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/male_names_that_start_with_co.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/rejikokopofaligubovunu.pdfIn PDF document text
    • https://s3.amazonaws.com/degerutisig/bosch_glm_80_user_manual.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_off0000da3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3F 4776 bytes
SHA-256: 8bfd107154866128ac047d17050c3c68270308af11b5e160e407315162d45a90
font_01_sfnt_off0000ea59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA59 10256 bytes
SHA-256: e87ea9f3607eb8ab130b13075ec1e1c8bc2c552939e42d1a7bae809a18538306
font_02_sfnt_off00010d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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