Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb31bdb226a55ac5…

MALICIOUS

PDF

74.3 KB Created: 2021-01-31 10:08:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cef639d4296bf50bcb019ec41eabb696 SHA-1: 0818cf2ad95482580c42c36d96622c93b4fe0247 SHA-256: bb31bdb226a55ac5b9f3c36a9a0309eb0e4acea43f22d4e044b952db869a346b
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'dating chat rooms uk free', suggesting a social engineering lure. The embedded URL 'https://traffset.ru/wb?keyword=dating%20chat%20rooms%20uk%20free' likely leads to a phishing or malware distribution site, aligning with the spearphishing attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/wb?keyword=dating%20chat%20rooms%20uk%20free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385217/normal_5fcb9e4d92f67.pdfIn PDF document text
    • http://trickyturkey.com/steam_inventory_calculator_cs_go2ae5n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485152/normal_5fe6dd324307b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449417/normal_5fd27f9b2a463.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/saeco_aulika_top_manual3569d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415322/normal_5fc9a8d48a504.pdfIn PDF document text
    • http://securityverifiedservices.com/56650874707xl206.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488116/normal_60064b8970a1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383450/normal_6015de0853c28.pdfIn PDF document text
    • http://masovizifuzaro.iblogger.org/home_loan_emi_calculator_excel_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463788/normal_5fd877194453a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/national_geographic_english_books.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/table_of_contents_portfolio_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/caedmon_s_hymn.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/brothers_karamazov_constance_garnett.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/zodexosoromitodeferuzufo.pdfIn PDF document text
    • http://zoxokukazo.epizy.com/guwulazufapulikasamela.pdfIn PDF document text
    • http://kixulal.rf.gd/34616678403.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BF 5324 bytes
SHA-256: c871862dbe0571ed472c86d4a4aac0284699dc31508b4d51759e79a5f10deb88
font_01_sfnt_off0000f8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 10376 bytes
SHA-256: d889d4a8f791ec39f37b8486d1784875223d6af7763914424b2eee4457cd09db

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