Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fe3cb67895f146…

MALICIOUS

PDF

76.8 KB Created: 2021-03-06 10:05:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 58adf3fa3dd07e7453960e47fc07c18c SHA-1: 455f982e9223cb7bddf55a24f8ca9042770b01d9 SHA-256: 75fe3cb67895f146891d0a7b7ebbd994edf555dcf9e1e1d134a73ac9f5f92f3a
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which, 'https://botokaw.ru/strik?utm_term=what+is+the+difference+between+ssi+and+social+security+retirement+benefits', is flagged as suspicious. The document body, though heavily obfuscated, appears to reference social security benefits, suggesting a phishing or social engineering lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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
  • 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://botokaw.ru/strik?utm_term=what+is+the+difference+between+ssi+and+social+security+retirement+benefits PDF link annotation
    • https://movudari.weebly.com/uploads/1/3/1/0/131070737/wonalupi.pdfIn PDF document text
    • http://trokot-tonirovka.online/maths_worksheets_for_6th_gradey5v4v.pdfIn PDF document text
    • http://everydays.space/how_to_present_secondary_data_in_researchtli3x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465145/normal_5fee2c30c2f92.pdfIn PDF document text
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/6998794.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409393/normal_60016c271b263.pdfIn PDF document text
    • http://teksol.xyz/8443157530a1gad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486987/normal_60148595d5ec0.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/acf1ba49-c00f-4460-84bb-825ed578ea91/proctor_silex_12_cup_coffee_maker_how_to_use.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/ada_lovelace_school_ofsted_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8bca3d-a6df-453d-b741-e6ba2e776a13/what_is_brayton_cycle.pdfIn PDF document text
    • https://59b17237-83b3-47c6-9d40-f547da5b0434.filesusr.com/ugd/827194_de3e06bfcc7645a897d3546be42b5983.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/16211106901.pdfIn PDF document text
    • https://3dd85f33-233b-4b3c-8e53-142bc8307eec.filesusr.com/ugd/8df890_e8e32147524d4965a0770ebbfdff41e8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d576119-0834-4bf3-b275-50a568584c93/51310421986.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/xegivere.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/angular_6_form_control_dropdown.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/blank_map_of_europe_1914.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_off0000ed5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5D 5608 bytes
SHA-256: 957a9a2567ae2f5d60fb9fbf856d45e602b6aaefb0b9eb5024d292e58acc1903
font_01_sfnt_off00010065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10065 10688 bytes
SHA-256: d495910b5499c232e6ef2cad53419bfd1478dd64766672895a7fbf1b5fb1c261

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