Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f81ae081dffaa5a…

MALICIOUS

PDF

75.2 KB Created: 2021-03-26 11:00:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6e97333d5239ec15cb17857137871b95 SHA-1: 4942ef4fa28cc7a0388bfe713020ac7ea2da5990 SHA-256: 7f81ae081dffaa5a5b76a5e94949765647085dbf8da09137d985f5716b6a4c4c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of external URIs and the overall structure strongly suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=bushnell+neo+xs PDF link annotation
    • https://cdn.sqhk.co/jirowolad/ciicyjf/gigovikotakovo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458417/normal_5fcaf641c3528.pdfIn PDF document text
    • https://cdn.sqhk.co/jifexekezeli/ZdidDC5/nedetodolenorusefafes.pdfIn PDF document text
    • https://zumaraje.weebly.com/uploads/1/3/0/7/130776401/potatapitateme_jujoses_wigog_jazamemuwopij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369143/normal_5fe24571d34f7.pdfIn PDF document text
    • https://nodeseverew.weebly.com/uploads/1/3/5/3/135323512/0604de98ba6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453337/normal_604c9b7e9450f.pdfIn PDF document text
    • http://saporik.scienceontheweb.net/microsoft_sql_server_2020_certification_70_764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_600a66bb9ad6d.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/f9b89df48d729.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/309590d8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5fd8af8b1d6a6.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/Ga3jbid/lopufevopojesarow.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/3df22466-86b4-45a7-a97a-8517330286b5/nomezovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d715f2f5-ea5a-447b-839d-e7f0a1dbd9fe/ingenuity_swing_and_bouncer.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/karambit_fade_pattern_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/793815088.pdfIn PDF document text
    • http://tikomiwewo.atwebpages.com/zodetosap.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/xezesejozedazanoxaxezusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a137274-2911-4e65-9c37-1884c45f5fa0/what_are_the_duties_of_a_program_coordinator.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_off0000eb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB02 4584 bytes
SHA-256: 43f2c567fcf56a2c058c6266d3f2de3bd5bcbb387e8032275c01923b02e29282
font_01_sfnt_off0000fa9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9D 10960 bytes
SHA-256: d2c596843483aa9a6b88cd9b5e9e6e9473dc8d9fa74722efad86a186e12f55cd

Open this report in the interactive analyzer, or submit your own file for analysis.