Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e0b57d65a01337…

MALICIOUS

PDF

67.9 KB Created: 2020-12-17 02:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 755664df17c5c15ee2ace3ce9ff8be2f SHA-1: 60ed595f1f73c393229bbe0f915bc84a99c6dba2 SHA-256: 34e0b57d65a01337107f19c05aa8ccafe83075866ac64f8ba659fec3753472d0
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/123?utm_term=ruger+blackhawk+357+holster+and+belt PDF link annotation
    • https://xufolonul.weebly.com/uploads/1/3/2/6/132695880/6294386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_5f9101d2dee5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467019/normal_5fc4550c4055f.pdfIn PDF document text
    • https://xaweworamek.weebly.com/uploads/1/3/4/6/134610398/5189702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5fa2189411292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_5f99262e2a50d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5f9c1b0739ada.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/zoromexemuzid/virelak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0f0e1f-ebae-4016-8db2-64985b2e5af2/23562781539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/126c588b-653f-4ea2-80b9-37c90200284b/jipoxukedim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b09c0d7-cd3d-4336-ae3c-b87cc32e3418/50303356698.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_off0000caaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAA 5872 bytes
SHA-256: bcbb77f39dcdb94f7ca08454ff4b143f01d84f2b44c1a6b0b9ce5c3c9ce3d535
font_01_sfnt_off0000dec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 10668 bytes
SHA-256: 6b907cc6758279a4c4a34994f5870eb0b9a36e673e5820997de36ad921ccd987