Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a3770c43daebea…

MALICIOUS

PDF

76.9 KB Created: 2021-05-21 06:34:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: eb9e5968b8f97f275751524538d943b9 SHA-1: 98e3f5f2086de8efb969a158bfadc46f87dfcf23 SHA-256: 09a3770c43daebea3c45d87d71a671290f8c2b3278cf10697612dbb3e550d535
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely a phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=can+snapchat+be+dark+mode PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465543/normal_5fdc4a625713e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413976/normal_5fcb6477e5ae8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_606dde6595926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_6036f2462088f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501503/normal_604ba6b2539ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450003/normal_5ff4fa693c719.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506170/normal_5feeb7ed666f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_5fd0d3e43991f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480732/normal_5ffeb49865be3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381543/normal_5ffccd9c6ea32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454162/normal_60360d389cc34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_60289573a53e1.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/94538083-728d-4981-a41d-c6ad8b7d2fe5/how_to_analyze_exit_interview_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faffb1ab-e523-4d5e-94d5-a29bd95781e4/79442923985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaddcd5b-bc59-45ec-989d-3d93332046a6/78098886796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdcd1ec6-40cb-4e50-8e57-f949477e73b7/transformations_of_sine_and_cosine_functions_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9845c0eb-6b6a-4267-98fd-ad1d85fc0f23/karugisekemadimuvamus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f7211b-861a-4127-87dc-691855a4fed9/holt_geometry_chapter_9_test_form_a_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3154d7d1-6773-45ba-8012-1a43feb395e7/how_to_reboot_my_verizon_router.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7668c6b-5588-423b-bf7c-07870d11dbec/what_you_need_to_check_when_buying_a_used_car.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ca62d9-fb49-43cc-9a3f-1fd2b964ac27/24809453333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c46f816-18f9-4c00-a891-419ee1afae6c/dd_monsters_manual_3.5.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_off0000efb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB1 5388 bytes
SHA-256: 41de9e3d26c191cf873c937b7a02d46307e99376e3d185dd05581727e67f797a
font_01_sfnt_off000101cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CC 10760 bytes
SHA-256: 33af77ebb36e9433e3bc91238fead78ab6b572b13b04702a5333111e534015c5

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