Malicious PDF — malware analysis report

Static analysis result for SHA-256 0afb3088a799a0d0…

MALICIOUS

PDF

71.4 KB Created: 2021-01-28 05:24:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5c926e3ff2d324b177d1006ac201b813 SHA-1: 1f94921e59a9032817a02d20edd03dab54ad00d2 SHA-256: 0afb3088a799a0d071db1cff5dd3151cbf971a4d4b4e7397bdc056c6b85f17bf
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'bologen.ru' was extracted, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded URI are indicative of a common attack pattern for delivering malicious content.

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://bologen.ru/123?utm_term=area+code+210+cities PDF link annotation
    • https://cdn.sqhk.co/zidulibu/iuEicSZ/impulse_response_function_formula.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/5gjgguw/53674764695.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/m9gkgc3/dragonvale_cooperative_breeding_hints.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/jdiebia/petokudik.pdfIn PDF document text
    • https://cdn.sqhk.co/vijukifezu/Y7jhMAV/sivavumatu.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/3iagjhi/mortal_kombat_movie_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/tetaxekumipi/dihiaHC/wetikibukilefobe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/banula/admission_form_for_nursery_class.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/59806188974.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/oregon_dmv_test_questions_and_answers.pdfIn PDF document text
    • http://gorevifero.epizy.com/xesasonexul.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/agile_testing_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/factory_automation_market_report.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/andrew_scheer_immigration_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/82178524523.pdfIn PDF document text
    • http://wonetone.rf.gd/sakenosuguk.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/first_amendment_101_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/sbi_anywhere_personal_app_free.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_off0000dbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEC 5216 bytes
SHA-256: db21385b112d47db99224f9bf66f4ed644c9b16424e8a34976cd87e32e0b80f5
font_01_sfnt_off0000edb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB6 10324 bytes
SHA-256: 0e9862bd93f072055179c8d1029062b2f8a5877aca2175a5d64e10338a1e1a74

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