Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f15dc9e4d7793ea…

MALICIOUS

PDF

138.9 KB Created: 2021-03-01 02:13:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 030f244cce370f52dd7d86d6963436b9 SHA-1: 6a009a964b57c7d7c9677fcdb88424dee4c725ee SHA-256: 2f15dc9e4d7793ea29942fd86de900de6e1732c53f1f31d29f0606a5b610004c
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik'. This, combined with ML classification and ClamAV detection, strongly indicates malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be part of a multi-stage attack involving a password-protected archive, though no explicit password instructions were found in the truncated document body.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://yafferge.ru/strik?utm_term=what+is+container+name+in+oracle+19c In PDF document text
    • https://static.s123-cdn-static.com/uploads/4374956/normal_5fee97fb8c80b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382413/normal_5ffe41ea17232.pdfIn PDF document text
    • http://fineagencyy.com/ladebofewoxibc6rut.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/fAiihbp/parental_influence_definition_psychology.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/eidhegC/headquarters_goa_naval_area_recruitment_2018_admit_card.pdfIn PDF document text
    • http://lotto-investclub.com/653255398619qdgf.pdfIn PDF document text
    • https://cdn.sqhk.co/lotivadafe/dgelALP/xexawugulu.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/top_books_to_read_2020_australia.pdfIn PDF document text
    • http://begdas.space/992526220701zkw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466386/normal_5fd08aab10e83.pdfIn PDF document text
    • http://dofuluxaruze.22web.org/bexutimedosekoputuduj.pdfIn PDF document text
    • http://fruits-summer.fun/angular_2_template_freeoevib.pdfIn PDF document text
    • http://thedefenseforge.com/silver_age_sentinels_d20_character_sheetxkkcx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530846/normal_5fee92267bc94.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/1XigBjc/999151127.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/firudegix/gogolubokatijisunabumew.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/nice_guidelines_palliative_care_fatigue.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/zomixubipulimidaxaduludep.pdfIn PDF document text
    • http://dabevejef.rf.gd/ice_cream_cone_writing_template.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/ubiquiti_picostation_m2_default_password.pdfIn PDF document text
    • http://kobewanen.rf.gd/galowu.pdfIn PDF document text
    • http://nanefelizili.epizy.com/2358861047.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_off0001e2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2E4 5260 bytes
SHA-256: db49117b3c4ca5ba472a2b61b4d683d2a66a32967b66586b25c986b01c5514a8
font_01_sfnt_off0001f4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4AD 12008 bytes
SHA-256: 527f37ecc40259779ed3e4dc8a97879d3cd85cdea7e6f32692949f75a4496bdc

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