Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c8bc8520cc4271…

MALICIOUS

PDF

107.7 KB Created: 2021-02-23 18:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 00585536a93c26747ee946985211821f SHA-1: b4b33b7a7159601e907828d4489d17a1095d98fb SHA-256: 73c8bc8520cc427138e9165a88d0bf7ccb7b0c8a3b76f1949019f8bc3c09ff88
136 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL leading to a phishing domain, disguised as a search result. ClamAV detected it as Pdf.Phishing.Trojan, and a machine learning classifier also flagged it as malicious. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be instructing the user to open a password-protected archive, a common tactic to bypass gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/strik?utm_term=what+is+the+best+charger+for+samsung+galaxy+s7 PDF link annotation
    • https://dedelazixuni.weebly.com/uploads/1/3/4/5/134596723/mofamako_fibulusoku_buvenitifemusu_nopupuwelo.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/rjcox4x/95636686973.pdfIn PDF document text
    • https://tezijiso.weebly.com/uploads/1/3/4/6/134690371/bimefekupi_dofubusug_kilobeveg.pdfIn PDF document text
    • https://nirulutot.weebly.com/uploads/1/3/4/7/134700174/laxidizujewo-fivubafikitov-givesemimobu-pufuni.pdfIn PDF document text
    • http://netabemoli.22web.org/local_guide_seoul.pdfIn PDF document text
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/lobaseper_gopekakilixuk_dinap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tokatefozude/how_to_delete_amazon_assistant_android.pdfIn PDF document text
    • http://votitagupen.epizy.com/73532918390.pdfIn PDF document text
    • http://vedajimiti.rf.gd/paturikijaxolup.pdfIn PDF document text
    • http://visagiza.epizy.com/sitoduvu.pdfIn PDF document text
    • http://kexeban.rf.gd/99715706265.pdfIn PDF document text
    • http://xuperag.epizy.com/athersys_inc_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/state_department_authentication_form.pdfIn PDF document text
    • http://lemazuwijenuxan.rf.gd/sepsis_2018_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/homework_2_economics_e_napp_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/57103171014.pdfIn PDF document text
    • http://wubalele.rf.gd/masogowawatubukarogis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BA1 5580 bytes
SHA-256: 26aaa342e719b32915dbecb6ba7002edaba36952f8c2f7ae4240ba1e439b3fc9
font_01_sfnt_off00016e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E93 10724 bytes
SHA-256: 895fc81998973c4dfe9a0f9ab40e64615267ec60fca4eda97ac8e6406cf1b185
font_02_sfnt_off00019318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19318 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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