Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3e3b18c9236649…

MALICIOUS

PDF

75.2 KB Created: 2021-04-13 21:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 95a6fb94c358a89c50210af10b1dafe0 SHA-1: 5ee2936a616fcfe615d03b82a599db8d4a19a592 SHA-256: 6e3e3b18c923664929768757267c0d6d44f74eed2ba0e64c797cf8394ef079a3
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it is a malicious redirector link, pointing to 'https://yafferge.ru/strik?utm_term=how+to+drive+a+lamborghini+gallardo+spyder'. The document body, though heavily obfuscated, contains text related to driving a Lamborghini, suggesting a lure to a phishing or malware distribution site. The ML classifier and ClamAV detection further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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=how+to+drive+a+lamborghini+gallardo+spyder In PDF document text
    • https://static.s123-cdn-static.com/uploads/4379491/normal_5fde71936011a.pdfIn PDF document text
    • https://cdn.sqhk.co/bepoweruga/ijgc9je/sandwich_king_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/lagolipumepi/hggic1H/silent_letter_e_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/8gi0jh9/earn_to_die_2_2012_game.pdfIn PDF document text
    • https://cdn.sqhk.co/texekikevow/lFghjge/17496645333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403119/normal_5fd670d4ba7d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411921/normal_6020293e97002.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/jehdgge/fowekemigiwekikuzuxalupar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_5fdc733380ae9.pdfIn PDF document text
    • https://cdn.sqhk.co/dabebasavus/jhijQjf/15312043952.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/vazisi/manekur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41cb03d-5b99-47e6-a421-a00d7805c679/telub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f02cdd5-cc6d-4dc1-a623-cfe2dccc93dc/betudonojulef.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/displacing_indigenous_peoples_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/mobugumifupirupidenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbb54e9b-c513-49c6-b3f0-89170f82fcaa/riruberejivevar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd11bd5-e12a-418b-9670-c1cd84c1c87a/el_nombre_de_la_rosa_serie_rtve_capitulo_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8198dd35-7805-4c4d-9615-25bb1d336c3f/bepimusebosozozobonovaso.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/income_tax_calculator_excel_sheet.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_off0000e4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CD 5728 bytes
SHA-256: 4906ab3d3796ee75435dab8785d4d7f35ad58cce08883a817dc3113f626d4584
font_01_sfnt_off0000f832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF832 11624 bytes
SHA-256: 7820a6a4d952b3da2ff649c5863260e326d21ac8c2b729323ed2fbd0e9d9fb9f

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