Malicious PDF — malware analysis report

Static analysis result for SHA-256 5404f006e02749bc…

MALICIOUS

PDF

93.4 KB Created: 2020-12-25 09:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7eb0126c0c9b028e10eecb5940021c90 SHA-1: 9597b5d73874bd872cb1a801e860a0d741630f26 SHA-256: 5404f006e02749bcb732776b99d842544a18c049eae93dd5b997e427e994b11c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI, 'https://trafficel.ru/aws?utm_term=mapbox+studio+classic', was extracted, suggesting a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URLs indicate a likely attempt to direct the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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://trafficel.ru/aws?utm_term=mapbox+studio+classic PDF link annotation
    • https://cdn.sqhk.co/gemadaruvow/hftgjjf/pajexuximibuwozobuxev.pdfIn PDF document text
    • https://kuzeloxowew.weebly.com/uploads/1/3/4/3/134330257/7094266.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/321b711d-88ee-41ff-a285-39c4e700f1e1/ancient_egyptian_prayers.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/gajebijufenemudotak.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/98915199010.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/newaxisedugepade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68990968-794f-4ff4-a080-38c56a833543/nuzanelofedirepepibezof.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/airsoft_claymore_diy.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/kefuzalut.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10658 10064 bytes
SHA-256: 771f2c78f51e06b6a0ae5d72247d723279cb234d526a7a39000eca12d73088fd
font_01_sfnt_off0001267b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267B 4840 bytes
SHA-256: 379f8a986a30e10cbe4eef3e9261a5827bc24bd9e2d6507a3f44617f58182e68
font_02_sfnt_off000136f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F1 10360 bytes
SHA-256: c141b0fd809451b182ac89f5e302e64809ce539ac05e4682d458ea95093025c1
font_03_sfnt_off00015a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A81 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e