Malicious PDF — malware analysis report

Static analysis result for SHA-256 e483d33252cbb866…

MALICIOUS

PDF

68.0 KB Created: 2020-12-24 03:11:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 616098486545422e561609c71fa4daf1 SHA-1: dd5325ddcba134eb7474c4a1f631913b5b1caef5 SHA-256: e483d33252cbb866e4a69e980a5670367287074f8efa2791bef89ba6bae09ee7
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one specifically identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack vector appears to be directing the user to a malicious site via the embedded link, likely for phishing or to download further malicious content.

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://cctraff.ru/strik?utm_term=saab+v4+engine+for+sale In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388416/normal_5f907de5caa8e.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/pjbihjf/analisis_foda_personal_profesional_ejemplo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_5f9daf67d6cf4.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/5zhcPjj/bunny_boots_for_sale_uk.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/a1a46243-d3d9-4606-87bc-1dc1292337be/23204611539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5942f62-98f0-4629-8d98-bcef4a318586/basketball_score_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd3d1a0-f5e8-426e-89f0-9060386c86e4/51414148654.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/solving_inequality_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0f0d0c0-3fd1-4164-ba75-d6504be680e9/yi_fang_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/august_monthly_current_affairs_2019_gradeup.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/nogaduputuriwukab.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/70115741792.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943c40a2-e8c7-4355-a785-34f15f224bc4/kotoxabef.pdfIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/ripizesorekum.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/autodesk_revit_architecture_2016.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_off0000cda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA1 5324 bytes
SHA-256: a9e160862d9978fbfc49190f77e3013910f5d7af6e1b8b0b2e6b8c7c809ca886
font_01_sfnt_off0000dfe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE0 10312 bytes
SHA-256: 4d5c3c4e180fdbba13ccaf1633bc12b6020556705041b9a335bf21b47faefdc9

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