Malicious PDF — malware analysis report

Static analysis result for SHA-256 4910f5eb3ad4c941…

MALICIOUS

PDF

72.1 KB Created: 2021-06-04 13:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dff5a44d12b7f0fc73d7af35e085464c SHA-1: 1211ec9e23464aba26a3c930d008310bed4e7d5c SHA-256: 4910f5eb3ad4c94132b1b534b2eff2d84edc6137d7aa72581e61187be87666c2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://queure.ru/pbw?utm_term=baixar+livro+anatomia+e+fisiologia+humana PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/28111a6e-6050-43b7-964f-a184ae409594/tivofedowipemoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/831ec9a7-39db-445f-85c2-fe8f068087d9/what_is_an_example_of_reflective_listening.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffdd4902-7ec6-46e0-884d-e81694aac25d/fogifejojikamiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05ee87c9-3396-496c-8e8a-23844bf6a381/jotodewoviwuxuvamiperiber.pdfIn PDF document text
    • http://xumefosux.pbworks.com/w/file/fetch/144594645/12671534526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecaaf73c-1ab9-4e77-a30a-ddadfd0afb20/how_much_does_a_special_education_teacher_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f7676f8-e5bf-4f55-8955-54f9a86b2adc/xukafipi.pdfIn PDF document text
    • http://mutoteja.pbworks.com/w/file/fetch/144510504/tijasosejoxododan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95840cf3-88f1-4a59-863f-d0d1791be232/everything_is_illegal_in_massachusetts.pdfIn PDF document text
    • http://gudikijuruf.pbworks.com/f/how_do_you_unblock_a_school_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd3cc39-cf21-41ee-b8f2-11c69dc52280/presonus_mixer_ar16.pdfIn PDF document text
    • http://sozakuvepar.pbworks.com/w/file/fetch/144507030/30980501361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29672397-ff28-4c62-8002-893c3a95fd41/kawasaki_pa540a_engine_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89c44859-0a14-4b83-878f-898a75e67692/tobusilibatuvo.pdfIn PDF document text
    • http://nikekuva.pbworks.com/f/fufeweseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd34fc7c-b94f-4096-aa6b-3911a238b20c/what_were_the_main_events_in_the_ancient_greek_olympics.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_off0000d645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD645 5360 bytes
SHA-256: 29e03cbe3c31da5e4ace7b992d38d6481eb28643631dbf7e4e5cef421674ae0f
font_01_sfnt_off0000e861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 13976 bytes
SHA-256: 5b4aa00fd69708a5d05c7efacad92e2ae6c5c047b3fe23441368f339b5315abb

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