Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd5fd30992f3cca…

MALICIOUS

PDF

108.1 KB Created: 2021-03-03 18:24:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4fc9a80503b42f4becb627d509287f38 SHA-1: bfadddecdb55a3a5da6c72a6d1f10f8442d3d322 SHA-256: 7dd5fd30992f3ccae0153ae22fdc4906867b50aee11f72412e0b29acf6464a55
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple external URIs, with a primary focus on directing users to 'lozipotod.ru' and 'scienceontheweb.net', which are associated with link farms and potentially phishing or malware distribution. The document body, though heavily obfuscated, appears to contain search-related terms, reinforcing the lure of a search result.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=sony+rx100+vi+full+specs PDF link annotation
    • http://vugekowuzujed.scienceontheweb.net/16001801516.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490125/normal_5fe4f4af8e92f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_6020b463dfff9.pdfIn PDF document text
    • http://kieverts.xyz/what_happened_to_wendys_dollar_menui4dow.pdfIn PDF document text
    • http://pojesuwemi.iblogger.org/vamosuxisugenana.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dovulavavo/estilo_apa_bibliografia_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/upgrade_google_chrome_manually.pdfIn PDF document text
    • http://kifobidurusidi.epizy.com/50847369108.pdfIn PDF document text
    • http://ramogitiduvit.rf.gd/what_is_density_of_crude_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/2867418530.pdfIn PDF document text
    • http://nadurajamewe.epizy.com/twin_fitted_sheet_ikea.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/ibps_po_application_form_last_date.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/indian_food_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/febotilufodumolad.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00016949.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16949 25472 bytes
SHA-256: f41340e4778a04d1b72e22433be462046f7582f3e103376d99920ea411e57da5
font_00_sfnt_off0001325f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325F 5128 bytes
SHA-256: cf1bd7c7088176b180bc4680f3eadad93db2fea477557e5f716c56b7b50dc0fe
font_01_sfnt_off000143dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143DD 10948 bytes
SHA-256: bad2ab5fa92dad24c76f09b3dd0a712f7b9151e70143a649016096ec1b936816
font_03_sfnt_off0001956a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1956A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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