Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3afa4ad1e3b6da…

MALICIOUS

PDF

79.7 KB Created: 2020-12-27 20:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 386a2bb2103b45e5c1575925ba0d7b81 SHA-1: 794414071cabbc51865e979aa6b0c729d535f158 SHA-256: 9b3afa4ad1e3b6daf1c6698533eb21edd617d90b5178c4900aad4d09cbc3a7f3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded URL is disguised within what appears to be document content, suggesting a lure to trick users into clicking. No scripts were extracted, but the PDF structure and malicious link strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=throne+of+glass+series+order+to+read In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_5f8ee97ab23be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5f891375177be.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/wipotegadodorek/89295643743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce4bf762-4926-4026-a07f-aeef374401fd/37537839466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3938b333-7529-4815-90ad-9b5c0dbfc717/4976930336.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/12562223652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef783fd-7f13-4dce-a6a1-edd1117e2c52/tinojesejuko.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/10th_class_maths_textbook_english_medium_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/kameduvizopi.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/face_recognition_system_report.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/mutilate_a_ragdoll_2_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a697ee-d162-4cf0-8f61-e8e987abf631/nemo_pelicula_completa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1016bd34-0988-49e6-9501-dc9d3b3d669b/masterchef_dessert_recipes_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/48261758257.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_off0000face.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACE 5120 bytes
SHA-256: 218550828f2854aa7b4375851fab5babb91303e5868e18153ee20d6ca0a95f99
font_01_sfnt_off00010c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C33 11028 bytes
SHA-256: b13da0c459254127bea13c1ca0c20432af7fb5581828fab532029ec2559a2565

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