Malicious PDF — malware analysis report

Static analysis result for SHA-256 4deac584f72d49e5…

MALICIOUS

PDF

72.6 KB Created: 2021-02-14 18:28:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 57d38893a23e5a41bc3acccf76cb9574 SHA-1: ee2400e822a1c314337134292cd435aa8e064147 SHA-256: 4deac584f72d49e5a55ce3c7972df00c441b9840c1753187f1372732af5b82fc
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and extensive link farm point towards a malicious document designed to redirect users to potentially harmful sites.

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 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.
  • 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://seumenha.ru/wix?keyword=cherrypickers+guide+to+coin+collecting PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460954/normal_6001fb1112931.pdfIn PDF document text
    • https://mowasevibipogo.weebly.com/uploads/1/3/1/3/131379904/kodaretifenaval-peladixasoxojas.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/9738895433ngu5h.pdfIn PDF document text
    • http://1offpark.xyz/libro_de_formacion_civica_y_etica_3_de_secundariay193v.pdfIn PDF document text
    • https://lekumoga.weebly.com/uploads/1/3/2/6/132683130/444193.pdfIn PDF document text
    • http://my-favshopg.online/legend_of_the_boneknapper_dragon_fuljkuag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384649/normal_5fefdf8d95b41.pdfIn PDF document text
    • http://insurancesouk.com/best_tiles_for_kitchen_splashbackamxb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482619/normal_5ff263f68c7a5.pdfIn PDF document text
    • http://petersikdar.com/free_lawyer_letterhead_templatesokt0z.pdfIn PDF document text
    • https://votetofovuwov.weebly.com/uploads/1/3/4/9/134901863/raviwekobuwal.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/wexoxaxawuwuwikurkn2m2.pdfIn PDF document text
    • https://jipotawa.weebly.com/uploads/1/3/6/0/136097183/wovovatopotugomenol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478127/normal_5fc96646d0009.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF84 5196 bytes
SHA-256: 62e856d7e441170b4ea3f2baf1046bf6caac552dc712922a053db06052f30c7b
font_01_sfnt_off0000f132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF132 10600 bytes
SHA-256: ad614a3c8edf6a3593aa4a18d2575f2ed93d42d3e13c33bc88ae9cf2e039d4b9

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