Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1f9184e8e5e3f7…

MALICIOUS

PDF

85.3 KB Created: 2021-03-02 08:27:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4312437049e21b072ef16e8b2010eef5 SHA-1: c3765b682e65c3b1a21bc8505f6ee375490e6c10 SHA-256: 6c1f9184e8e5e3f787b01919f5f39aee3a23934c02ccc6ac5e81a32e88b17274
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URL that appears to be a download lure, suggesting an attempt to trick the user into downloading a secondary payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/wix?keyword=uc+mini+pro+apk+free+download PDF link annotation
    • http://simultaneously.space/dobepazuworji486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_60106bb73c0d6.pdfIn PDF document text
    • http://bokaxakoz.sportsontheweb.net/eureka_math_grade_7_module_4_lesson_5.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/bgfvW9e/green_bay_packers_roster.pdfIn PDF document text
    • http://1xbet-football.fun/biology_book_in_bengali_free6uama.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393908/normal_5fe527e3d4d27.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/gdxSwhh/fun_run_3d_multiplayer_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448719/normal_602ed6101ee82.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/tolivajupeku/zutaromivadobu.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/how_to_turn_volume_down_on_adt_panel.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/crime_prevention_through_environmental_design_nsw.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/formal_letter_format_for_college_principal.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/luzem.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/atrocity_act_amendment_2018.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51B 4976 bytes
SHA-256: d68252f8898cb082d12919bece5e1aab7de9a459ee53860b6d7d0df4c5db248d
font_01_sfnt_off0000f5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5ED 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000fe7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7A 10644 bytes
SHA-256: 53fd43be27638351a9e9bb685051e61d85b27fb1b83f042fa3c5e67f658483d1
font_03_sfnt_off0001231e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231E 16452 bytes
SHA-256: d36ee6f4a09d16cda5e34ad02e78b16b38c319d38a651f7738f0b4e6cc9e41cc
font_04_sfnt_off0001392f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1392F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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