Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d073351d4869bc…

MALICIOUS

PDF

172.3 KB Created: 2021-03-08 17:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: fd5373a1bb72ee6461ece4fc96532cc5 SHA-1: 4fd70a237f1d0cc31dab9382f2f9f25c7de955db SHA-256: 59d073351d4869bceb1415abe36fe03621204993d0ca070f9bddb89238d6d84b
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and ML_NYX_PDF_MALICIOUS strongly indicate malicious intent. The document body is heavily obfuscated, but the presence of links and the ClamAV detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 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=what+is+the+court+music+of+korea In PDF document text
    • https://kawavaturitavo.weebly.com/uploads/1/3/5/3/135321378/1930108.pdfIn PDF document text
    • https://cdn.sqhk.co/rukokota/jagifib/binevulomudisupetulixafe.pdfIn PDF document text
    • https://cdn.sqhk.co/repipedifavi/OZibvMu/zig_zag_rolling_machine_adjustment.pdfIn PDF document text
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/b00e5a1af1778a.pdfIn PDF document text
    • https://zivukiwele.weebly.com/uploads/1/3/4/7/134749768/geveza.pdfIn PDF document text
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/ab500c.pdfIn PDF document text
    • https://sezokifor.weebly.com/uploads/1/3/4/5/134596047/5949502.pdfIn PDF document text
    • https://rukururage.weebly.com/uploads/1/3/0/9/130968917/bf13b287b5c0.pdfIn PDF document text
    • https://bowulujakem.weebly.com/uploads/1/3/1/0/131069806/1746465.pdfIn PDF document text
    • https://xezatitewifesel.weebly.com/uploads/1/3/4/3/134393938/1417414.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/ahd68ti/digobolebira.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/87qhdgr/sukezew.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/icshbM4/23301804705.pdfIn PDF document text
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/c760d30.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://uploads.strikinglycdn.com/files/a462ae38-70f8-4adf-ba8f-ec3221ad5d4f/how_to_fix_amp_error_on_pioneer_radio.pdfIn PDF document text
    • https://e510c2d5-567e-4a96-89ff-abc18316baf7.filesusr.com/ugd/8a9bcc_690d34f2bab6411098ef10a356a58b8f.pdf?index=trueIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_8c7787a9bb1a4a50bce95a557cc0e4ec.pdf?index=trueIn PDF document text
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_2a67553f2e064c0d8d05866cea00f2d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vazisi/94244914160.pdfIn PDF document text
    • https://488c2ff9-9ff4-499e-8f11-525115e20b22.filesusr.com/ugd/8aba0c_d54952ea064a45e4b0b75fd5523f448a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/27921343833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e088cba1-2425-4bab-b32f-52eefefedf78/rasozesegapezixazufezag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ffb329-1363-47f4-bc2d-c184ec270271/tezirebe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001fe5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE5E 33168 bytes
SHA-256: d3924798c0f0441fe2c573d0e70e72f07c8391e6ef243d694158f159d066a4da
font_01_sfnt_off00025aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25AA6 4944 bytes
SHA-256: 5048dad82ecebc943b8d493fb7ccc8ab09f84fed710c86e71f39414dc4b1bda5
font_02_sfnt_off00026b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26B80 12656 bytes
SHA-256: 639bb8ea57f365f9ef383df1feb365bda87ad24884ded0935c035afcc8827b6b
font_03_sfnt_off000294ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x294ED 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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