Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd2948f80e847de…

MALICIOUS

PDF

78.9 KB Created: 2021-04-07 23:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2efd26c853826b168a6f319d41638463 SHA-1: 8ed03eb00ccb553ebf69ef6aab05cf400dadcfb2 SHA-256: 9bd2948f80e847def173e9f00af8333361439012f4d1ce272a5bd2c05a508e0d
264 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution attempt. Heuristics suggest social engineering tactics, including a 'ClickFix' lure and a password-protected archive pretext, designed to trick users into executing malicious content. The ML classifier strongly flags this PDF as malicious, supporting the classification as a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://yafferge.ru/strik?utm_term=h+264+network+dvr+admin+password+reset+software In PDF document text
    • http://lozipazom.sportsontheweb.net/ph_12_vector_components_worksheet_answer_key.pdfIn PDF document text
    • http://rent-nout.site/what_are_the_5_stocks_recommended_by_motley_foolohwj0.pdfIn PDF document text
    • http://iuts.space/daxusugaxogutokaviporudnihc1.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/85369740663.pdfIn PDF document text
    • https://cdn.sqhk.co/soribivevi/cgjgfjj/areal_pyramide_formel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476582/normal_601de645cd482.pdfIn PDF document text
    • http://lp-consalt.ru/kubukeraqc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_604196b08057c.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/gateway_nv55c_specsskzj9.pdfIn PDF document text
    • http://sadipize.scienceontheweb.net/46300708463.pdfIn PDF document text
    • https://cdn.sqhk.co/fipakebeb/GNS9Cja/sinesosemaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404297/normal_601e87a21e2f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492275/normal_5ff696ed649d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_60262710934d2.pdfIn PDF document text
    • https://cdn.sqhk.co/vufisolepu/jigdhed/86681075953.pdfIn PDF document text
    • http://remontnatali.ru/how_to_write_stylistic_analysis_of_a_poemc6p7o.pdfIn PDF document text
    • http://dombitarf.ru/shark_vacuum_powered_lift_away_partsr4u9t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_de703d47d7ac47d1af02a86899fe4caa.pdf?index=trueIn PDF document text
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_245b0ff966524bea9a488a035ee7f28e.pdf?index=trueIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_be964ee6564b419fa0f9b0bb81ab96e0.pdf?index=trueIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_4f883b48f8374965b3230f5f134ced6b.pdf?index=trueIn PDF document text
    • https://107a3552-ed21-4f5d-95e3-510b6eae4444.filesusr.com/ugd/21bbef_033d0b2723b3415685496c081a1e0f82.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C2 5704 bytes
SHA-256: 66e50d4ffebf8e923824be91c7d8a4aa7053a7b275fcd19153e2f383872d170b
font_01_sfnt_off0001083f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083F 10536 bytes
SHA-256: 4ed5d029770ca06ba8fce691eb7bcd69a4b326a4841b787b79f9e0802038abbe

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