Malicious PDF — malware analysis report

Static analysis result for SHA-256 da325841fa14967d…

MALICIOUS

PDF

80.7 KB Created: 2021-03-15 18:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b4b67ba5fdd3010a39206c8e3a1b6947 SHA-1: ad9271ef1a64c22ff947f4ea70099db407763dd7 SHA-256: da325841fa14967d23ccbc78adf0b6371c2fae1f34c0e9e140bf5de58db555e2
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed for SEO manipulation or phishing. The embedded content, though heavily obfuscated, appears to be a lure related to driver's permit test locations. The presence of ClamAV detection and ML classification strongly indicates malicious intent, likely to redirect users to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/strik?utm_term=arkansas+driver%2527s+permit+test+locations PDF link annotation
    • https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/xalegorewopeb-kilezetesira-zamerupup.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/5ZhicAy/tamoselotisemov.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/93190190206.pdfIn PDF document text
    • https://ziwuwozapa.weebly.com/uploads/1/3/4/5/134517717/cb1baee3a6.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/23487362684.pdfIn PDF document text
    • https://xegiduburap.weebly.com/uploads/1/3/5/2/135294675/f57c09153b0.pdfIn PDF document text
    • https://vavivaso.weebly.com/uploads/1/3/0/8/130873957/8d452e.pdfIn PDF document text
    • https://cdn.sqhk.co/xexogataza/hbhbghB/happy_paws_mobile_vet_clinic_colorado_springs.pdfIn PDF document text
    • https://pamemigewoguvo.weebly.com/uploads/1/3/4/4/134438925/kekinamitof.pdfIn PDF document text
    • https://vawosikajoj.weebly.com/uploads/1/3/1/4/131438279/fusirukew.pdfIn PDF document text
    • http://lakegefufen.scienceontheweb.net/warm_bodies_film_completo_streaming_ita.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/cqgfxRV/63117318702.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_308f0531c1bc4f83ab3ab8d5291efd6d.pdf?index=trueIn PDF document text
    • https://a82c121c-2200-4cd7-aff6-47cf910fdadb.filesusr.com/ugd/117c17_86b9f7ccc8404b8585751f789ea484cd.pdf?index=trueIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_b2be5a9ec0f54c90b134a9090fdc12fd.pdf?index=trueIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_75241691ac324e2d8e739e1d6518c343.pdf?index=trueIn PDF document text
    • https://0108a07e-94d6-443d-bfa7-575dd38852ad.filesusr.com/ugd/756a01_fdb4230557a44a93be525e49d9c301e9.pdf?index=trueIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_fd4f4f6771ea4320a9f30a9d87f9bf8a.pdf?index=trueIn PDF document text
    • http://valupakukav.myartsonline.com/wexoneregagijedogifi.pdfIn PDF document text
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_98295783ea974626874e906e5c6f1eee.pdf?index=trueIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_4071d1b5f1974fd2853c84ed575e214a.pdf?index=trueIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_00d68179c45e4559a6820988c527bc93.pdf?index=trueIn 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_off0000fc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5B 5364 bytes
SHA-256: f6a90d551859527805c863b4df2e871f7d5227876e9b8086222e152503502d3d
font_01_sfnt_off00010e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E94 11328 bytes
SHA-256: c21c33a274bbc1b8b035471bab3de68912a569bb7e8d30e06c8af388323af720