Malicious PDF — malware analysis report

Static analysis result for SHA-256 a628067e5ddb51a5…

MALICIOUS

PDF

77.7 KB Created: 2021-03-29 15:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 29778bf21d4259bbfe6aa15d9304f9cf SHA-1: 95d07401427c4aee707e5076c2f3edef04ba060e SHA-256: a628067e5ddb51a596b4f797e1e9d2651f9a09f226a7df341c63152d268e1391
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, contains text related to 'process control and optimization', likely a lure to direct users to external URLs. The presence of numerous external URIs, many hosted on disposable domains, strongly suggests a phishing campaign aimed at credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=what+is+process+control+and+optimization PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381532/normal_601f57cc512e9.pdfIn PDF document text
    • http://trydouche.xyz/sebalufunedatiwilewulebsc77.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/tixarifunivewagaziziwawvk32v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406482/normal_5fce865ae661a.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/libototawevuzifidu424rc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420224/normal_605939719e539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470524/normal_605d9778672fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_6035e0b80a99b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_602365e77dbe5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455890/normal_6002d30c7dc46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422912/normal_6020dbbb53eee.pdfIn PDF document text
    • http://peskomment.ru/rupodisabapaxorrv5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455194/normal_5fde59cc3ade6.pdfIn PDF document text
    • http://raisinsapp.club/84493798873vvuz9.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/wansview_ncb541w_softwareiaa5x.pdfIn PDF document text
    • http://legionmone.xyz/zorugebupisitejkyas1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/free_letterhead_templates_with_logo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9445a129-e934-4cef-8462-1a3e9da5a0be/how_to_be_swing_trader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aff3160-82ed-4042-abc7-3f203f95468d/4272465241.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/what_is_quality_management_system_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/quote_template_excel_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25791824-0a65-4b48-9d45-8830d7d3da88/76101149558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1714f41a-f54b-4e30-96a6-f209862c4740/civilwarland_in_bad_decline_summary.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_off0000f0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F3 5376 bytes
SHA-256: abf27e3f16fdfb97276ff9ff4a5ceec5616953c0390a3752e026de6c59c706e6
font_01_sfnt_off00010321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10321 11076 bytes
SHA-256: 0747378f3ce27143bade93670e5192d64ea61f75e3164c4cf666f0d939a352ca

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