Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ea672f749f9318…

MALICIOUS

PDF

69.4 KB Created: 2021-02-17 22:22:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e560d78decf51ac6473c66f509529931 SHA-1: 17d9d26e681ce41e11b06dc21870b4f57f03e999 SHA-256: 57ea672f749f93184597df3f5f4935a544b2fe43a6bc0147c31ab67d4baf9a3e
96 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://maypoin.ru/wix?keyword=upper+body+muscle+exercises', which is likely a phishing or malware distribution lure. The PDF structure itself is also flagged for suspicious object definitions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=upper+body+muscle+exercises PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rizolejebogu.epizy.com/bascom_avr_windows_7.pdfIn PDF document text
    • http://bofumegudatoxos.rf.gd/serilejolujesetawimit.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/camaro_ss_2016_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/mugutanosugiguborot.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/best_facial_mask_sheet_for_dry_skin.pdfIn PDF document text
    • http://fiwabafedazuv.epizy.com/gegijumog.pdfIn PDF document text
    • http://jasukapikubov.rf.gd/tekutavifonosed.pdfIn PDF document text
    • http://kowisefofob.epizy.com/lizovovefalafekifepaxeno.pdfIn PDF document text
    • http://banudozege.epizy.com/how_to_count_to_10_japanese.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/aktiebolaget_skf_annual_report_2017.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/best_home_blood_pressure_machine_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/93651741800.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_off0000d3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D7 5312 bytes
SHA-256: e6b6ad0a40b8b7fc93d426c0c3ac87c35f74df4f3200da5befc267b6c67d458e
font_01_sfnt_off0000e5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DA 10180 bytes
SHA-256: 28fa903328d4e87a70238cf26d2eb6cf83c0b8ad64191a86c0a4731bc523566a

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