Malicious PDF — malware analysis report

Static analysis result for SHA-256 15381bd7e0c482ba…

MALICIOUS

PDF

76.1 KB Created: 2021-05-18 09:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ba8b71246723e78be8172dd8ee8c4cb5 SHA-1: d1bca0a4ad5f7a1f9e2c1c218d852ac6e3f54a4d SHA-256: 15381bd7e0c482badbd9a5fb16041d7699cb522b37ae1e6b8d95483451a30200
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to TV network setup, likely intended to trick users into visiting the malicious URL. No scripts were extracted, but the presence of a malicious URI and the ML classifier's high confidence indicate a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://maypoin.ru/strik?utm_term=how+to+connect+a+2nd+tv+to+dish+network PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426063/normal_6056f1367a3ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413120/normal_5ffcd6c85d464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_6052dac9e03a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_60152d3e4bf63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403948/normal_5fe581114ae38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_60338d4910b80.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/mibiwivanetuj/10675776885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22be67f5-3ae4-42d4-8bf4-e5396204b2eb/how_to_find_the_slope_of_two_points_without_a_graph.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/symmetry_worksheets_kindergarten_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f23c73-14f0-4e27-9506-d370b4dd3cf7/monitor_de_signos_vitales_comen_c80.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83142d13-8ff4-401d-8b44-ec64f66a8c80/77380425701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02499279-6468-4d54-a7fd-e73d8b67c618/637650785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58014c08-4f9f-4055-920a-5c508a046d70/he_wrote_an_essay_on_the_origin_of_species_and_natural_selection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8b517c-b2b7-4fea-b185-d797644de485/buxuwatuda.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_off0000eb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB66 5304 bytes
SHA-256: 55e584380eb6171cc201d8751fb994d92af7bbbb3fb399e86940c213a3685ccc
font_01_sfnt_off0000fd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD86 11200 bytes
SHA-256: 45b1426caac7183fa57d85bd0d3055b1ec37610fb5469847c7cc2081b2501459

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