Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41e97c672ac8be3…

MALICIOUS

PDF

89.9 KB Created: 2021-05-12 01:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3833af374b85f4aafd989a8909697d48 SHA-1: 3d8ef06f4c6fedca6107d52f29b4ce6071381ba7 SHA-256: d41e97c672ac8be34c1d1470007f85d4868ad2f3ec110c40e8f94f83bc2826b4
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains an embedded URL pointing to 'fokemale.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'Irobot braava jet hard floor cleaning solution ingredients', suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=irobot+braava+jet+hard+floor+cleaning+solution+ingredients PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467298/normal_5ff5b0ed8b16f.pdfIn PDF document text
    • http://trikotoria.ru/paripohrzs2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462379/normal_5fe90fcf59eb8.pdfIn PDF document text
    • http://hookup757.fun/32241035377hlxdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376354/normal_5fe434ee9291a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368955/normal_6008d4c3d98c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_603036e001164.pdfIn PDF document text
    • http://xsafak.com/71861733190kvjug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369313/normal_606b342614897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490724/normal_6027feb99eac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366304/normal_6047fc121de90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421623/normal_5fedcfd83f64b.pdfIn PDF document text
    • http://xeporivol.iblogger.org/40755946139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485573/normal_604f6f1753bef.pdfIn PDF document text
    • http://indohealth365.online/69148764164j4dwy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500187/normal_5fffb3983662c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447669/normal_5fc6f074471c6.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/d5688dda-09bb-4ed8-a1bd-3963c56242d6/whirlpool_duet_sport_dryer_stopped_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e504df25-c308-416a-8654-9d35bdf8c4a9/propiedades_mecanicas_de_los_materiales_ceramicos.pdfIn PDF document text
    • http://nuxejoxulagub.rf.gd/60019669104.pdfIn PDF document text
    • http://lezebotetojezaz.epizy.com/dumisiloserevodam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93f93957-f1b0-4969-968a-1c05bb7b2e6d/35308760608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17d743bd-040d-4611-b94c-54ca81251a6e/ruud_silhouette_2_gas_furnace_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12277 5496 bytes
SHA-256: 7283e4d3ecf5dddbedeac41e867124e4a0af13ec9034f7b74edfb30ee687bf87
font_01_sfnt_off00013531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13531 10512 bytes
SHA-256: ed418d479f803d0445f6056a75a9117bbd078cb7bf066e317bb7290f5075d179

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