Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf34425901a45763…

MALICIOUS

PDF

72.7 KB Created: 2021-06-06 13:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4bb8e2eb2038bedc74d9b0c4ccd725d9 SHA-1: 0c5ffb76dfd87855dad1d19f4a4066953803de67 SHA-256: bf34425901a457639a9151f01acbabf477e5ac5df71edbbb7e905e7973c56741
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://synerhu.ru/pbw?utm_term=meeting+room+booking+form+templates', is flagged as suspicious. The document body, though heavily obfuscated, suggests a lure related to 'meeting room booking form templates'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://synerhu.ru/pbw?utm_term=meeting+room+booking+form+templates PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471235/normal_603c3c83dcd3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474205/normal_5fecb754ba4d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417122/normal_5fcf66c82a245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426815/normal_5fe64e9c7b8a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_6017b5a5e4136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_601cda5603c52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422659/normal_60446610c639e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386595/normal_60b7eb504ecce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_5fd5fb2e8eb99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489988/normal_5fc6ce96565c0.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4475864/normal_60b6e545185ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478952/normal_60599b51784b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475219/normal_606a5ede6571e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408601/normal_5fd0396f5d74e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501656/normal_5ffcf183d9bb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446781/normal_602c188069ffe.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/46965d02-74d8-4d2b-ab02-4ab3b9094d5c/79350672399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e52395d-191e-45f8-85ca-6fbe475717f1/35309287133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfbbeec0-c296-4af1-8566-5fe02f28796f/geocentric_and_heliocentric_models_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f76c931-1787-439d-9188-c7a668bbe612/88164809650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6acd804-896e-41dc-87f0-8042558130a3/how_to_use_record_player_crosley.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95553b8-684d-44d0-bc69-dbade316d668/turner_super_sidekick_schematic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a84513-ff5c-4bcc-a99f-96c474ef931a/vobenaxixemebagujataru.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_off0000df85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF85 5432 bytes
SHA-256: d607e443f205a33f5149281096bd32d1d044c0400324dc7c44303421b4e708a6
font_01_sfnt_off0000f1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FA 10344 bytes
SHA-256: 50bdcc4c23f2158fb0e6ad7d007a5c2f951dd49df9d0b2d2d3793a0f6b0d2814

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