Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec38af941cf3336…

MALICIOUS

PDF

72.8 KB Created: 2021-01-05 08:34:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a94fb3e4461a8d193db00a80f305f4bf SHA-1: ea8908b2fa55a4191fa4409716cc1c908efb785a SHA-256: eec38af941cf3336d523744bef1b9033451afe3fbc467811535d9a812f8324de
214 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse to drive traffic to compromised sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?utm_term=peruvian+near+me+miami In PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/f48febdfc93c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385424/normal_5fb95740e0622.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487186/normal_5fdd3a519110e.pdfIn PDF document text
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/5da1d24a1817e.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/ibdzBhj/18091039721.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/4a35137a-66b7-43b5-a09b-8af831d0a52a/bokefafofotaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a64e94a-06db-4993-b364-f3cda1e4ffaf/fannie_mae_borrower_certification_and_authorization_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88671064-0d9e-4ae6-aa45-f58682572609/nolawopidukekipemofiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62798442-e3a8-4809-af32-e03df0797c83/designer_mini_ipad_covers_and_cases.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee1a60db-50d9-4c56-9ab1-541948c8a8bd/jedado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5382ea2-6aba-40d2-a27f-518b1ce2b43f/new_england_20_gauge_single_shot.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_off0000e062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE062 4684 bytes
SHA-256: 0d8145edbaad2ad860d49b747f579eb296cde4f5c31075e52c84f534870416f3
font_01_sfnt_off0000f038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF038 11228 bytes
SHA-256: 4024a1fdcf17e004fc71058a1e52e99a006a181198ac818f35ee9b0883487e22

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