Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1c4d7eddf386df…

MALICIOUS

PDF

80.5 KB Created: 2021-03-17 07:01:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 09081a12bafeae8e554eff5539a73b24 SHA-1: 9c6d3f6073a16466cc36e5d2aa1de9d35611aeda SHA-256: 1d1c4d7eddf386df7462c19b4f4fc0d21ccaf7a4f1b09d1d60cd255d94febd56
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=armor+of+god+images+hd PDF link annotation
    • http://nitesufi.sportsontheweb.net/xewamepa.pdfIn PDF document text
    • http://rupaduwovuw.getenjoyment.net/18284672246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_60170a15625ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366622/normal_5ff7f9e479b17.pdfIn PDF document text
    • http://pojokup.getenjoyment.net/zenuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/sururezog/gwZxMif/space_frontier_planets.pdfIn PDF document text
    • http://suzolovopu.iblogger.org/how_many_books_in_the_red_pyramid_series.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465136/normal_6022e68857620.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/reviwiraropenezarutawe.pdfIn PDF document text
    • http://xivitej.66ghz.com/vlookup_from_multiple_sheets_in_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/icwridy/interactive_ball_launcher.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_604cc5ee60ff3.pdfIn PDF document text
    • http://maloxibosuveviz.iblogger.org/international_accounting_standards_1.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/b100e103-35cb-42f3-95c5-4099c13829cf/68610608623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20572d49-f507-4f8a-bec6-d1457e17e758/chopin_24_preludes_henle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79724002-3949-4313-9934-4d3fe35ff900/nekulenofirelena.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/sitalikadorob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e0a2aae-9652-4926-902d-640a3d9a36bc/pazajagezewolowusi.pdfIn PDF document text
    • http://niribulikebi.rf.gd/4854488520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/612debb8-1313-479c-afcc-a78deb8193b2/gudubedidugafinabapesemiz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB75 5368 bytes
SHA-256: d7f2f70f1d12c7b8fa63cc8c1a617f7abb5c0580fba490b0ab8c899490d24ebe
font_01_sfnt_off0000fe08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE08 5280 bytes
SHA-256: 92b57795b51f57d43edb3f2e81ba30eda6b28ef48b43be9e1748587b7a79edde
font_02_sfnt_off00010fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD1 10804 bytes
SHA-256: 881ece6362fd9c78838bd2b0df2bae592a6d4974b8c3d47022056145b3ef7f7f

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