Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4af35190f7eb93…

MALICIOUS

PDF

69.9 KB Created: 2020-11-21 04:33:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5a0df8c4e5f6075521fa60dbe2f1c50b SHA-1: 1e8c92cba20cf979767060e65b0929d1b267be06 SHA-256: 9e4af35190f7eb93716ee9e7a9c87ad1e805c694fcd4cb7841711708ec449359
134 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to trick users into navigating to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafftec.ru/123?utm_term=who+knows+mommy+and+daddy+best+baby+shower+game+questions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411717/normal_5fae6af45f686.pdfIn PDF document text
    • https://mubuzetuwifo.weebly.com/uploads/1/3/4/7/134703000/verigazojafude-kodewituvijugi.pdfIn PDF document text
    • https://jeretidaker.weebly.com/uploads/1/3/4/5/134595905/e22279603a02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5fa475cd602a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427104/normal_5fb6d023a7e0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8aa1022fca0.pdfIn PDF document text
    • https://puwisubefubozaj.weebly.com/uploads/1/3/4/5/134516422/8ab4be31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455881/normal_5fa1f49153c91.pdfIn PDF document text
    • https://letitunonagafi.weebly.com/uploads/1/3/4/4/134494227/namari.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.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/8079a39e-176b-44ee-91e8-c0a1abfcf32b/lodelugojubanowupeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c0126a0-c29e-4c28-b205-585655778ae9/acronyms_worksheets_for_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7435b5e-681b-41f6-8adc-075011ff7be7/polk_audio_monitor_60_series_ii_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/blackberry_z10_autoloader_10._3_2.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_off0000d4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BD 5744 bytes
SHA-256: f72f744d559ff4dd0d4a3778a7550afd623cd4e9efa7d9279cbb95737bbf42b8
font_01_sfnt_off0000e82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82E 9916 bytes
SHA-256: 68821f0d7864c5cd800a176c7067de7e11485844e40d781f180b396d33f0d09f

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