Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8e4e34162664da…

MALICIOUS

PDF

77.1 KB Created: 2021-06-06 04:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d4842867d74f501df13bc8ad4c2e5d43 SHA-1: 33066a2fc73335bfc8ee4fb207598c8d50d12b0d SHA-256: 6e8e4e34162664da51157c446ec657424c79dbbc1a20fb0522a4a277b614e83f
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The document contains numerous embedded URLs pointing to a link farm hosted on disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and the link farm structure indicate an attempt to redirect users 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://pistant.ru/pbw?utm_term=limiting+factors+of+photosynthesis+graphs PDF link annotation
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/634a336e.pdfIn PDF document text
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/malokimudujan-xorevegizikajek.pdfIn PDF document text
    • https://paratokoke.weebly.com/uploads/1/3/0/7/130739311/6471100.pdfIn PDF document text
    • https://tasogedogag.weebly.com/uploads/1/3/4/6/134606554/3560952.pdfIn PDF document text
    • https://sefovajeve.weebly.com/uploads/1/3/0/7/130775607/df23b7a0.pdfIn PDF document text
    • https://nagaxubonafebax.weebly.com/uploads/1/3/1/6/131606673/01d9e51cd62cb.pdfIn PDF document text
    • https://lesakotuvolev.weebly.com/uploads/1/3/7/5/137505649/netojut-lijorese-jezurobit-lurojokur.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
    • http://tosuvop.pbworks.com/w/file/fetch/144475146/29196599709.pdfIn PDF document text
    • http://gijorugisaw.pbworks.com/w/file/fetch/144675489/kogigev.pdfIn PDF document text
    • http://pafunanukexe.pbworks.com/f/74926041892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8191c7b8-d73e-4b49-9f42-df98277196ee/1210508151.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/w/file/fetch/144609471/96466338863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c214c6-bfc7-4157-bd98-5cbeec4df5d6/45005072027.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_off0000e41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41F 5228 bytes
SHA-256: 7a98c45e654db8f9815591a6b54311648803f7c621a73cdfb01c6161c0a2fdc3
font_01_sfnt_off0000f5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BC 10264 bytes
SHA-256: 886cf99a0c35a67d53f5b71541290308b1ff847e41fc29102ecb721bf7d14fda
font_02_sfnt_off000118db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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