Malicious PDF — malware analysis report

Static analysis result for SHA-256 221c3104b48d2f20…

MALICIOUS

PDF

65.2 KB Created: 2021-03-30 17:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 15987fe9d627ccc78ff9f1d56246d164 SHA-1: 53d8dce3d12f78147c1c7916d6829eb2f38e7ded SHA-256: 221c3104b48d2f208bcc93e718bb4961d37a7179b78dc6eb2012ddaf8240b08f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of an external URI suggests an attempt to redirect the user to a malicious site.

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://leonvi.ru/wix?keyword=smiths+level+1+fluid+warmer+service+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474462/normal_5fcf09f1a90db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414689/normal_601dfe7ca29cc.pdfIn PDF document text
    • http://bnl-jobs.com/a5_booklet_template_designa1jaz.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/5x5Tgdj/nbc_sports_app_authentication_error_on_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/bidgeEF/star_wars_squadrons_xbox_one_joystick.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxuzoxu/fqeCigK/gojufazubafiroweti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389097/normal_6059d9babd38f.pdfIn PDF document text
    • http://demask.space/81550869063p4oil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459926/normal_5ff4df041f107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420604/normal_60163d78f104d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423166/normal_5fe6374611b33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414851/normal_602a3811e909e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420586/normal_60512410aed67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478687/normal_604ee7c25e177.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482020/normal_5ff03f6752bf2.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/a9de075e-3eac-48fb-ae17-be12b2a7488a/trane_xl80_furnace_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8dbcb5-e10e-40e9-b8f4-7ddc108a7bea/rozenawo.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_off0000c127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC127 5568 bytes
SHA-256: f510d07500442c0651a80dd61bdbff3adad535a5143661793ff34e3523237d44
font_01_sfnt_off0000d40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40D 9884 bytes
SHA-256: 5e2c732cb822279edccf891a9e7237fd828b60c58425a971bb96ed935c9141d5

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