Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e51b9c682e1431d…

MALICIOUS

PDF

77.0 KB Created: 2021-03-20 19:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 52c5c86a18676ec7a480e685aa9892ae SHA-1: 2344575a658bb6958a3bf919a8a50acfeb91a3b7 SHA-256: 4e51b9c682e1431dce2c376aa59916df78b13e8e2b3282c94d339db451aadc74
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for credential harvesting or malware delivery.

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://seumenha.ru/123?utm_term=conchita+cabrera+de+armida+libros+pdf PDF link annotation
    • http://pitushok.space/stock_market_hours_vs_after_hourse0b5e.pdfIn PDF document text
    • https://pofexetebi.weebly.com/uploads/1/3/4/5/134592759/e50141481.pdfIn PDF document text
    • http://demask.fun/music_maker_hip_hop_beat_producer_key9uve5.pdfIn PDF document text
    • https://fopojikanerev.weebly.com/uploads/1/3/4/8/134888820/xipelomogi.pdfIn PDF document text
    • https://suxomaloki.weebly.com/uploads/1/3/4/5/134598925/70221fc8a.pdfIn PDF document text
    • http://byseles.xyz/revolico_en_holguin9qao8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://defixudopa.rf.gd/malayala_manorama_calendar_2020_download.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/jexibuxejimironuxa.pdfIn PDF document text
    • http://putuvigerukuxu.rf.gd/linear_algebra_lang_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51235e35-34f7-4443-852c-738dc57dbb07/what_is_linker_loader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edec0f78-0c1b-4bbf-8892-7a5e9a918b1b/31239281773.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/rofivogul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a3d108-0a65-4b20-9837-2d9888911b6d/when_and_why_did_japan_quit_the_league_of_nations.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/sample_cover_letter_template_for_highschool_students.pdfIn PDF document text
    • http://napezidemilolez.epizy.com/common_core_math_5th_grade_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/after_anna_todd_vk.pdfIn PDF document text
    • http://gigisijopa.epizy.com/60147508022.pdfIn PDF document text
    • http://medipebep.rf.gd/a3_booklet_template_powerpoint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9beadf4-92cf-4ec7-b962-c551a810f9ee/nexoda.pdfIn PDF document text
    • http://najubizep.epizy.com/zuvanu.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/florida_utility_bill_template.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_off0000ecba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBA 5440 bytes
SHA-256: 0b506645b9931f80344a91df3cc65f7a8093d7dc5f2876443832fa42fcbc634c
font_01_sfnt_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 11604 bytes
SHA-256: 913c2dcf7fbe94fbc4c7987d567da7e1db09398d34d384460733687203baa94d

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