Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e31310729f9abc…

MALICIOUS

PDF

74.2 KB Created: 2020-11-14 10:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 714950148ff2ebb736ea11b4d16cd3cd SHA-1: 52a7c083978ae9881151634edea448b6fa73b345 SHA-256: 24e31310729f9abcece2c5579b0007d2b7d7262c1edc065c48b99f5d7a037c3d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a phishing lure, potentially leveraging embedded JavaScript for malicious actions.

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
  • 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://traffset.ru/aws?utm_term=letter+writing+template+ks2+twinkl PDF link annotation
    • https://vakigosem.weebly.com/uploads/1/3/4/4/134480352/0af54fb2f61c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_5fa66293def75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f9e3e3362ddd.pdfIn PDF document text
    • https://gubaxefu.weebly.com/uploads/1/3/4/5/134592394/kogefol-kenizow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_5f9b06ddce12c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374181/normal_5f8f26b229fa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393502/normal_5fae7c2b11b56.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/f0525005-79c4-40a9-a8e7-094d4e46a991/fijin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ed4b6a-88b9-4fab-b239-6d001c584b71/rusale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102251fa-9d62-43c9-99ba-27c74140b86e/83353455752.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/briggs_and_stratton_outboard.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/novep.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/45100863546.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_off0000e5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D3 5368 bytes
SHA-256: 037a4a5c628d74ea15d690cb040b50d5d223b0fe4bdc0e5446a985578cdcbffb
font_01_sfnt_off0000f815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF815 10540 bytes
SHA-256: db3841f927c2ced4445305fdc5e04788929241ff061064ec2b999499a26ee05a