Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f214b64edf74af…

MALICIOUS

PDF

129.5 KB Created: 2021-04-14 11:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5702471f47783f8e1ed8c46b40a5ef62 SHA-1: b0691cf637b798e7568c75ad1fff18847d2424fe SHA-256: f2f214b64edf74af3fdc0d7ed15a612b1e9fcd3837544d066953f7650ae948ff
196 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, many pointing to suspicious domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to sites hosting malware or phishing content. While no scripts were directly extracted, the PDF structure and numerous suspicious URLs are indicative of a malicious document designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jacksth.ru/strik?utm_term=describe+the+positions+of+earth+moon+and+sun+during+a+solar+eclipse PDF link annotation
    • http://omoikiri.info/weekly_personal_budget_template_excel3yt5r.pdfIn PDF document text
    • http://managerprogram.live/nugepidomurikodakibizexix77921.pdfIn PDF document text
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/6166317.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427498/normal_6006f8ef2740e.pdfIn PDF document text
    • http://swast-group.website/14391847665h1d46.pdfIn PDF document text
    • https://dapemoko.weebly.com/uploads/1/3/4/6/134647299/lonadomibokurawegap.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/xerakoderina_bomukekoror.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405895/normal_600524c3d70cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392873/normal_5ff1eca53e3bd.pdfIn PDF document text
    • http://netewe8.xyz/define_rectangular_formrp4pm.pdfIn PDF document text
    • https://jomagikovire.weebly.com/uploads/1/3/1/4/131408086/c9f8c30.pdfIn PDF document text
    • https://tebivozov.weebly.com/uploads/1/3/2/7/132740763/5016512.pdfIn PDF document text
    • http://twitter-center.com/sling_training_full_body_suspension_workoutqfkzz.pdfIn PDF document text
    • http://ihsteam.ru/aula_f2088_manualx7m3l.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
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_bcf0fd7ab4f148fca3536bdf85bbfedd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/kipagebifir.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/80940529617.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/86433916261.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/73665394657.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/68030946660.pdfIn PDF document text
    • https://7f2467c6-0d80-4e38-8df7-27624e0b9669.filesusr.com/ugd/e19533_9eeaaa20104648c49fbe6e95a1238201.pdf?index=trueIn 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_off0001ac6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC6B 5588 bytes
SHA-256: 31102e1265f538aada203ec007fc3340369cbf2fb7a53e2fc68a332fe2125645
font_01_sfnt_off0001bf2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF2F 12472 bytes
SHA-256: bf5c42fd720ee00f0f9ed54b664d0690c5c8f9ce81341cb37cefb56c02aa6bc5
font_02_sfnt_off0001e982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E982 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3