Malicious PDF — malware analysis report

Static analysis result for SHA-256 059ba665033396a7…

MALICIOUS

PDF

88.5 KB Created: 2021-03-30 13:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4df3eab1d6702783e26be97cb857253f SHA-1: 26e89591e1928b38a4b3aae0f385ab259c91d3bc SHA-256: 059ba665033396a7408f18e5f10bd1b2fc0459476ad08b4316f94e8bf51347e2
186 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, many of which point to disposable hosting services, suggesting a link farm or phishing attempt. The primary malicious URL identified is lozipotod.ru, which is likely used to redirect users to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/123?utm_term=caterpillar+backhoe+operators+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366005/normal_602a431533e4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_600c3c8fc2578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478688/normal_60143c4bd1786.pdfIn PDF document text
    • http://ipatovaalena.ru/fizukimaj6mcqx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_6029623b30ee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413705/normal_603f57b30120a.pdfIn PDF document text
    • http://serviceforyou.site/nurumavelufuridlnw9q.pdfIn PDF document text
    • http://smirnoff-optic.com/75327771686x0uat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_603e9ef5538c8.pdfIn PDF document text
    • http://scm03.ru/the_fappening_3.02jows.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419832/normal_60549d94d32c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465264/normal_5ff3ba1e13ca6.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/81e5d4d6-7b70-4aa4-ae8a-31b2ed398581/21572192570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd9ab6a9-681e-48cf-9bab-a77865b56cc4/zopuxepovemipukizoxuvigo.pdfIn PDF document text
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_fb6892ab70704f4c81bc0223b2f9bce2.pdf?index=trueIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_2faa2877b13d4081aa02eb101db5f6d0.pdf?index=trueIn PDF document text
    • https://c75ed97e-f406-4d79-b864-c99612e64be8.filesusr.com/ugd/a66d15_12c464e87e704bc68637db7bd0968f46.pdf?index=trueIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_978c35d9b2e94fb7b4783041bf4f1aef.pdf?index=trueIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_1dd75dc0543f4b71bce30e4944b256aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5a1c57-30bb-4f18-858b-9ee273f33c24/netimigexisosajirun.pdfIn PDF document text
    • https://1261df91-4e32-40b2-8b8a-4050d3c54cbb.filesusr.com/ugd/df69c1_11ba77c5dba9416184fcdbc66a8895e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2199c133-0f07-4ccb-ae93-b8c88b8929fb/77754036343.pdfIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_ad2e37f537244cdbad2cdf0f25b11720.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_off00011c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C37 5280 bytes
SHA-256: bd6514110925bd7febaccca44da2657d3acbd4628fa2107a61f2df653e235ce7
font_01_sfnt_off00012df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF7 11380 bytes
SHA-256: 45991ecf83d995316bbf6e4eb4f1355a52e485c12f585874468304e9ac14654d