Malicious PDF — malware analysis report

Static analysis result for SHA-256 456e71f85e734727…

MALICIOUS

PDF

68.0 KB Created: 2021-03-08 02:53:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0d71ed9f82840cc65d43e60c96a3f626 SHA-1: 32e3a4c9465022afff13d012b2956b833951b725 SHA-256: 456e71f85e734727457aed59758e4c98d4f548463649d96e468b33123f06055a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one pointing to a URL that appears to be a search result for a product. This suggests a phishing or SEO poisoning attack, aiming to redirect users to malicious content. The presence of a large number of PDF links, including one hosted on s3.amazonaws.com, indicates a potential link farm or distribution network for malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://botokaw.ru/wb?keyword=motorola%20verve%20buds%20110%20price%20in%20bangladesh PDF link annotation
    • https://nuwomanat.weebly.com/uploads/1/3/4/6/134664603/8612705.pdfIn PDF document text
    • http://zezasarasojid.mywebcommunity.org/ramevotamogi.pdfIn PDF document text
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/e30d312.pdfIn PDF document text
    • https://xukonupuzifig.weebly.com/uploads/1/3/4/6/134621954/cd708a0354.pdfIn PDF document text
    • https://ranixujofenak.weebly.com/uploads/1/3/4/0/134016935/kogedesaze.pdfIn PDF document text
    • http://eurofamily.pro/personal_biography_template_freessvjd.pdfIn PDF document text
    • https://jiromozuno.weebly.com/uploads/1/3/5/3/135387519/1354374.pdfIn PDF document text
    • http://mopowataxix.medianewsonline.com/30958471395.pdfIn PDF document text
    • http://resokipuga.getenjoyment.net/pidijum.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/94242857864.pdfIn PDF document text
    • http://d-youtube.com/3685165089ongx1.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/tiduro/xeramopumalolugivabodal.pdfIn PDF document text
    • http://susixegan.rf.gd/fetal_echocardiography_free.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/beach_buggy_unlimited.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/liwaxofa.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/mifofa.pdfIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_667168fafbde4051a416db4f0a676850.pdf?index=trueIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_7e28134f068e44d78481be2d2648684f.pdf?index=trueIn PDF document text
    • http://xenavak.rf.gd/salary_of_indian_coast_guard_assistant_commandant.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_off0000ca52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA52 5732 bytes
SHA-256: ac3c5c629fef65ea56cf679115c2ce24004faef3579b03bc324fa14661e6c217
font_01_sfnt_off0000dddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDC 10736 bytes
SHA-256: a06ad36028344216e91878ebe2040c50a70635d6176817ef150e27a51e34a585

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