Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae46cdb5e0c7f09…

MALICIOUS

PDF

122.0 KB Created: 2021-06-01 16:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86cda9793153a768530ed692a1d3438e SHA-1: 5c91e95ebdd7eb8fc02d6f2b026c7eba6d9b390c SHA-256: 6ae46cdb5e0c7f099a38ce34126873495143fa385dec32a1e090cb1ecf99b9ec
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of an external URI points to a social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://allytemp.ru/pbw?utm_term=beyblade+burst+evolution+episode+2
    • https://cdn-cms.f-static.net/uploads/4464707/normal_60314236021ac.pdf
    • https://cdn-cms.f-static.net/uploads/4459319/normal_601bd11b98348.pdf
    • https://cdn-cms.f-static.net/uploads/4403118/normal_60505df79019f.pdf
    • https://cdn-cms.f-static.net/uploads/4402520/normal_602e8506b9eab.pdf
    • https://cdn-cms.f-static.net/uploads/4497344/normal_6035994203fb9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/80b04a53-21a4-44ea-8ecd-a738df3a3cf9/how_to_create_wealth_investing_in_real_estate_review.pdf
    • http://vatojorisa.pbworks.com/w/file/fetch/144443547/ssc_stenographer_exam_paper_2019_download_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/b9a3298a-2c3c-490f-ac31-944d4d96954b/37737160652.pdf
    • http://zopujoxobug.pbworks.com/w/file/fetch/144411426/buwurezomenidelolafulawis.pdf
    • http://palixazoke.pbworks.com/w/file/fetch/144427944/solving_exponential_equations_worksheet_with_answers.pdf
    • http://ziduzobif.pbworks.com/w/file/fetch/144439446/how_to_make_a_lego_republic_gunship.pdf
    • https://uploads.strikinglycdn.com/files/5b674d4c-4e34-458e-8d33-feff8556fd32/kojijemiba.pdf
    • https://uploads.strikinglycdn.com/files/ea0ce1b3-6076-48e1-b80b-79cef9af104a/how_to_format_cd-r_for_audio.pdf
    • https://uploads.strikinglycdn.com/files/cad0b5fa-550b-4829-ba59-b579d5ae1a5d/dd_5e_campaign_settings.pdf
    • http://natizasex.pbworks.com/f/90358100621.pdf
    • http://vibevekofano.pbworks.com/w/file/fetch/144426204/16981267529.pdf
    • https://uploads.strikinglycdn.com/files/822aa92d-6e42-4c7f-95ef-8322cc031ac3/59672011785.pdf
    • http://zopujoxobug.pbworks.com/f/boxers_and_saints.pdf
    • http://wisarazed.pbworks.com/w/file/fetch/144466539/can_you_retrieve_deleted_whatsapp_messages_from_icloud.pdf
    • https://uploads.strikinglycdn.com/files/f9cacece-2e0a-4806-851d-89dfa51f29fe/how_can_i_record_facebook_messenger_audio_call.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000111aa.bin
c446ef4d1debbb1d8bdaafb103dc4c64d966e6e67d4e9178aa52460b53d10002		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x111AA 47860 bytes
font_01_sfnt_off0001a1fc.bin
ad174154365b93d1649fab3ecfe4ba731b1d9226b2c8172c2c49c52284b9f9da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1FC 5436 bytes
font_02_sfnt_off0001b48c.bin
168aa6286c1d2ab17ccac5c43a84528c3b72f7aafa4083c364ab1884c1e81bc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B48C 11436 bytes

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