Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d289129253caf3b…

MALICIOUS

PDF

72.6 KB Created: 2020-12-31 16:16:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4a7671a50da27bcc303d0c825dc47342 SHA-1: 73d0a9fe20f2b06fa4320c0b02148a84bcdb588e SHA-256: 3d289129253caf3b969c03802d0651dd35b87bb7f52d16d356016b83ffd91d24
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 infrastructure, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/strik?utm_term=cute+pocket+cat+3d+part+2+apk In PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/6de4423.pdfIn PDF document text
    • https://zowupenejanelaw.weebly.com/uploads/1/3/4/3/134397621/jovosabemijasa_lagalulotekax_tedazufotuba.pdfIn PDF document text
    • https://vutifiruva.weebly.com/uploads/1/3/4/5/134595151/kerumagifik.pdfIn PDF document text
    • https://degujipimisa.weebly.com/uploads/1/3/1/4/131453395/9864572.pdfIn PDF document text
    • https://josebugovoje.weebly.com/uploads/1/3/0/7/130738719/6ce2dd.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/3ee3e757-66c1-49a0-94b3-38007923ec6c/35942298480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d6e5b0d-d4cf-4ed8-b046-96a4f39bac3f/75105855061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d058b9f2-807f-4764-9678-c254f0b7f8d5/73573366419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d10ce337-e4bb-4b1b-ab37-960916018aac/gijejumekegonolimiburudol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39ec26f5-5ca2-48be-b113-e7ecbe9ca5a5/dabud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cec5f93-fbea-4d33-8fa6-f41666b0bfdc/20645996897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8c4556-fb50-40e5-9d68-f1706565a750/palm_tree_3d_max_block.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_off0000dbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB8 5120 bytes
SHA-256: 5f204a42c3340e818db0b6e698deb2433535c5ab0b7fba2fa9ae5886f041d2e2
font_01_sfnt_off0000ed31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED31 12136 bytes
SHA-256: 369d03cd6d4e0b018e659abd2428138db0bd925906ae1f2387b4c71edf0dec29

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