Malicious PDF — malware analysis report

Static analysis result for SHA-256 964223faddb8ac59…

MALICIOUS

PDF

76.1 KB Created: 2021-03-13 21:08:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5a40410bebfdae9e93d0f19f0d835033 SHA-1: 2e1787783cd0e86aef231a92fa2d788baf3bb5bc SHA-256: 964223faddb8ac59d2cc6b4a1b6b93dcdeac2dfd24e38aa9be4d5a58af917129
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains an embedded URI pointing to 'https://pelibifir.ru/strik', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of malicious URLs and high detection scores suggest a malicious intent.

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://pelibifir.ru/strik?utm_term=how+to+use+quran+cube PDF link annotation
    • http://kungfumalibu.com/chng_trai_nude_vi_nhauh0ojf.pdfIn PDF document text
    • http://jakartapro.xyz/information_security_jobs_dubai_salary753bx.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/ehi9Nja/65573006581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_6030f81a23871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5fd22fdadbd14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422150/normal_5ff936c3b7634.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/Vkhaggj/osrs_ancient_wyvern_shield_ge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368468/normal_5fefd6df6e93b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473919/normal_603c31aeec8b0.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/dVjbYge/72559830922.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/1fc9592e-080f-4364-87f2-64f1ca41ccf7/how_to_calculate_manpower_requirement_in_manufacturing_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/873bd16b-6627-4142-b605-cbb87857ef08/vixumivolitabitoramur.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/mojerarupurejavuveka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0cb8bd-2eb9-4fd1-8b48-358613f623b7/kotters_change_management_theory_in_nursing.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/47606237259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d91b1d-81ae-4b17-a428-94d15b604ecc/guxokixovexatos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e133c0-e92f-489e-ae5a-9fe5ea13cee9/bodozefari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356c7433-5b42-47ce-834b-d6514ac22a9b/python_list_remove_nan_values.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/9371759923.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/linetotenojiwiselulewixa.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/congratulations_on_your_new_promotion_notice_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0998eae-50bf-462c-9ee2-34c8f0182c4b/how_to_tie_a_knot_in_a_piece_of_string_without_letting_go.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_off0000e9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B2 5080 bytes
SHA-256: 272015b569ba403f71c3d10bba6ad90cb1c32563ec8408ddf6087b8210a16d34
font_01_sfnt_off0000fb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 11572 bytes
SHA-256: 8021e9fe437fe12e111445f41038ed2a6a8b096ef8624f42d8837848774bd44e

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