Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ba37a89a2de367…

MALICIOUS

PDF

71.8 KB Created: 2020-11-18 16:23:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 11d347b3916679d1e7096ccb1805c2d4 SHA-1: ef2dca6e55e8beb6623bc203c5edf62c67f03d38 SHA-256: 57ba37a89a2de36741ff3349fea19f5d75f577d8a2487a7fcbb3cb8d3bd57f03
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=valhalla+long+hive+plans In PDF document text
    • https://bevarolemi.weebly.com/uploads/1/3/4/6/134685224/9132102.pdfIn PDF document text
    • https://bizavurodetilu.weebly.com/uploads/1/3/4/3/134391156/1b9246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_5f9b706c24c1c.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lonevu.pdfIn PDF document text
    • https://gozivuwedigati.weebly.com/uploads/1/3/4/6/134612943/194a4b7c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5f88edce700a4.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/tadovu/24837079738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4180d9cb-8ca2-4ac2-96e3-626e2f5dca3b/kelifa.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/formation_infirmier_anesthsiste_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/51312294193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/395052fe-d941-44fa-98ef-ede44a2f3b02/packet_guide_to_core_network_protoco.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_off0000dcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF3 5008 bytes
SHA-256: 0f366cf04a8b9768e6dad6e9b968cdf2987b63ffdc32fce664ef10554ba8879a
font_01_sfnt_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 10752 bytes
SHA-256: f5aa02e4e4675b4a10b649d07cd98f147e7041efb8bfe0eb7d093f7f021be41c