Malicious PDF — malware analysis report

Static analysis result for SHA-256 45816b9e928ef4b0…

MALICIOUS

PDF

74.0 KB Created: 2021-03-18 12:55:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a21b7e922bb23fee190a69f52068399b SHA-1: 5c8f4fd11af00910fe1a6688754ecce4ba35d975 SHA-256: 45816b9e928ef4b0b5611a856d1213a01f9b2acd911410e5bdf65471df08a4b9
166 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into downloading a password-protected archive, a common tactic to evade gateway scanning. The embedded URLs, such as https://pelibifir.ru/strik and http://depupejaxidolip.22web.org/19307531231.pdf, are likely part of the distribution or payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=prohibido+enamorarse+de+adam+walker+pdf+gratis PDF link annotation
    • http://depupejaxidolip.22web.org/19307531231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471723/normal_6014aab0a30dc.pdfIn PDF document text
    • http://getallcreditscores.info/clinicians_pocket_reference_the_scut_monkey_11e_download1qql8.pdfIn PDF document text
    • http://vojidovalo.iblogger.org/business_process_analysis_template_doc.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/1gch0hj/2989421431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447278/normal_5fd7c6cde724b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460449/normal_5fdc2f2abd98b.pdfIn PDF document text
    • http://axecheat9.xyz/5237827839151lwe.pdfIn PDF document text
    • https://cdn.sqhk.co/fudikuzi/SzjdghK/funny_cell_phone_ringtones.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_9a81f977c8fd43079c2668ccfefe2cdd.pdf?index=trueIn PDF document text
    • http://fukogalijikufoz.epizy.com/53493321718.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/easy_savory_vegan_breakfast_recipes.pdfIn PDF document text
    • https://5c06e36d-e6a7-492f-989e-88f86e9ca1b1.filesusr.com/ugd/c9ae65_42c380c31cc8430a85cd840f1de872a7.pdf?index=trueIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_281e6232cd4644c8bbec425489210197.pdf?index=trueIn PDF document text
    • http://nemejubazabok.rf.gd/how_to_take_back_cover_off_moto_g6.pdfIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_8f32b2838e264835b305033e021db248.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/12_basic_functions_activity.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/integumentary_system_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/what_color_wire_goes_where_on_a_thermostat.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_off0000df1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1C 5752 bytes
SHA-256: becfedf7fcc9da2d17ecf635f9dcc13ab9d5516b38d24299c5aa2ab8039b76b5
font_01_sfnt_off0000f28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28B 12024 bytes
SHA-256: f0a55f053730cf67b06502ea737c1e651d8cc29ebaad26a6ed07673c92571ca2

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