Malicious PDF — malware analysis report

Static analysis result for SHA-256 deeb012d6a4c86a1…

MALICIOUS

PDF

59.9 KB Created: 2020-11-20 06:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 03fa7f3c34bbe70193b91a2ef3eb617b SHA-1: 18664c76ec6543df73cd92ab5ae973117c5d2314 SHA-256: deeb012d6a4c86a1d0fd7e7abdaf661129bad694b62f4c76e116dfe64c616df8
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or redirecting users to malicious content. No scripts were extracted, but the PDF structure itself is used to host the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/strik?utm_term=physics+a+strategic+approach+3rd+edition+test+bank In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392854/normal_5fa9c694ccaa8.pdfIn PDF document text
    • https://jeluvumo.weebly.com/uploads/1/3/4/4/134492882/lezuzolewatupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f892a0c2734e.pdfIn PDF document text
    • https://bofufawikifof.weebly.com/uploads/1/3/4/2/134235483/ecb4a1c695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415935/normal_5fa21bd521dd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f975e3967d62.pdfIn PDF document text
    • https://sivutonawoxed.weebly.com/uploads/1/3/4/6/134687919/7939921.pdfIn PDF document text
    • https://penusifobituje.weebly.com/uploads/1/3/4/3/134314418/1638273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494868/normal_5fb2811b3f7a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_5fb2f0ab4e5f3.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/dabatisew/swot_analysis_from_guide_to_management_ideas_and_gurus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd53708e-9d5a-4dc9-82f3-fefa39e03ba6/eso_deshaan_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17d1b081-b41b-4dc7-b1b9-884d8fed1433/17412520796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f718234-9ca5-4484-9900-8e825c4269a4/quarto_de_despejo_dirio_de_uma_favelada_ler_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5632c3-9b6b-4c27-b0fe-b98b0185821c/toponov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03c85c28-189a-488a-a038-2a18c276f009/90589375641.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_off0000ac4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC4E 5776 bytes
SHA-256: 311f64f05f4d1db8b70c8540f5ca8bf6ffcb607368a2e58fe971697f9a47d8f8
font_01_sfnt_off0000bff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF4 9980 bytes
SHA-256: 70c6ea018bcc8cc82b9482c7895c01abd4c67349e994996d36b52a02f488e0c6

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