Malicious PDF — malware analysis report

Static analysis result for SHA-256 0931e7f438dfd4a5…

MALICIOUS

PDF

89.4 KB Created: 2021-04-24 23:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a017512c845a51adc97174f10a725a96 SHA-1: 4636eb94e11f94cabef74282cc09581dbfcd7ed2 SHA-256: 0931e7f438dfd4a5dc78f68e8e55b24d18c91f390e119889c7f6d555a3e8029a
154 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, specifically 'https://yafferge.ru/strik?utm_term=qsc+gx5+crossover'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of malicious URLs suggests the document is designed to lure users to harmful sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=qsc+gx5+crossover In PDF document text
    • http://beremoter.online/kemaxujowubupasigevigarngj4r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457839/normal_5fe974b30b61c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464878/normal_60189fbe69cfa.pdfIn PDF document text
    • http://stat-index-co.com/belonujepuzokepopubgu6qw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463538/normal_5fce820be1a4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495854/normal_5feef54f3e815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503279/normal_603f882f75c1c.pdfIn PDF document text
    • http://todayshop.website/nebuvoburug0epof.pdfIn PDF document text
    • http://jurogiriwizezaw.22web.org/jifusijosovo.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/audiojungle_pricing_guidehsn1p.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/e7bb8fb2-f7c0-4744-84e6-af89ea59c6a0/digijurafawudavogam.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/hull_financial_risk_management.pdfIn PDF document text
    • http://jigiwema.epizy.com/the_life_cycle_of_a_star_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/basic_italian_phrases_quizlet.pdfIn PDF document text
    • http://kamiwivexa.epizy.com/speakout_upper_intermediate_workbook_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/65514057885.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/how_to_get_the_end_behavior_of_a_polynomial_function.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/balancing_chemical_equations_level_1_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1dc0e5-e9af-420a-ad3d-578f25bebf2a/fepevojokopozirizekubaxal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55c4e507-f1f3-418a-8cde-e43d405716e0/yajur_veda_sandhyavandanam_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bae3a01e-752e-4a02-a07e-c3d6a899268d/58332064518.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/bertelsmann_stiftung_transformation_index_bti.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/80647679875.pdfIn PDF document text
    • http://nogobixa.epizy.com/diablo_ii_druid_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa0c6980-0b29-4b56-bdb8-558064b30b24/94954581478.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D9 5036 bytes
SHA-256: 540d6753437347414cb15c7b5592f7c3b2760428e6f60a68ec13fd72e95cb8a6
font_01_sfnt_off00011623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11623 13060 bytes
SHA-256: a28fa98df320a2e5b5ae5715fa7e6be42dc3820a5eba967318c7e638230ea4cb
font_02_sfnt_off0001416b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416B 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61