Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b73ad767520a32…

MALICIOUS

PDF

79.6 KB Created: 2021-03-17 11:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b32242d3800fb0ffb1cc11261d15ba41 SHA-1: dbf9b05596f7e76efb8632a933c3c0b486d3ce30 SHA-256: c1b73ad767520a320e7d00fa4a113eb873f28da7dee0e645fd177fec0abe17fd
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, indicates a lure related to search results, specifically mentioning 'flowers that look like roses but are not', and directs users to a URL on 'mezovuduw.ru'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/wix?keyword=flowers+that+look+like+roses+but+are+not PDF link annotation
    • https://cdn.sqhk.co/devuzemalut/ohgqRgj/music_top_100_australia.pdfIn PDF document text
    • http://saudiautoinsurance.com/jusoguwjlw.pdfIn PDF document text
    • http://good-production11.site/cebuana_padala_formg3psv.pdfIn PDF document text
    • http://tewajaz.iblogger.org/binosakigutiti.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/big8WO6/phoenix_zoo_discounts_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385648/normal_600269babe35f.pdfIn PDF document text
    • http://vizionsmc.net/89848834302tumim.pdfIn PDF document text
    • http://zasasalusip.22web.org/bgp_interview_questions_and_answers_for_experienced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_601703134e624.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/pelugabene1k8it.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/Uji9tig/zunaliw.pdfIn PDF document text
    • http://megantv.site/44889565905785sf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464861/normal_60366dd9427df.pdfIn PDF document text
    • http://regse.website/19419051840by0yr.pdfIn PDF document text
    • http://potolkilife.ru/115706325792bbtg.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/584597a2-2b7e-4f4a-9419-c2cf50c7c698/how_to_write_an_introduction_to_a_literary_analysis_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a76d1f-b24f-4603-a304-6a7bbe3de4ca/tafutotabidowediji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446ebc29-0561-4a76-bdb0-e2e41399bed5/wofobirelo.pdfIn PDF document text
    • http://zewixezix.epizy.com/video_list_html_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4ad914-f3cf-4b75-8a12-53f4bfe41d40/83732648053.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_off0000fa43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA43 5024 bytes
SHA-256: d4feca196513e69a15c49dab2b82ccf45c536f1bb56f0b7e38eba9a0193a6351
font_01_sfnt_off00010b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B62 11008 bytes
SHA-256: 7bf4912e000fc86dfab77555a6013e0d6cc1e7567974cd51055ca0717548e7ec

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