Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a898365daab414…

MALICIOUS

PDF

163.7 KB Created: 2021-05-03 14:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f7b5f66dedddd25401f13319702f9ebf SHA-1: eaa22a7208d11f33de1f3182c9133ea24483c22c SHA-256: 33a898365daab4141768fd888d840b9a0f98e3f3eea55d7c14abf06e18be0acd
144 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is malicious, including ML classification and ClamAV detection. It also contains an embedded URI pointing to a suspicious domain, likely intended to deliver a payload or lead to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Pauline letters summary' and mentions urgency, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/strik?utm_term=pauline+letters+summary PDF link annotation
    • http://goodshopsales.xyz/awe_inspiring_me9qnej.pdfIn PDF document text
    • http://idealicaitalia-official.site/bible_quiz_questions_and_answers_from_matthew_in_teluguxsx48.pdfIn PDF document text
    • http://secureappeal.com/new_landline_number_format_philippinesz5kuc.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/igfUwoN/cyberfoot_2015_kay_t_kodu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_6057ceaec0cab.pdfIn PDF document text
    • http://mishgen.com/91633283743vatuk.pdfIn PDF document text
    • http://ejinaya.com/bissell_powerforce_compact_bagless_vacuum_21129oppr6.pdfIn PDF document text
    • https://cdn.sqhk.co/kamepixuxuk/7ggRidT/29986789671.pdfIn PDF document text
    • http://vashastrahovka24.ru/lafowuwilazidewenalajowa3m80z.pdfIn PDF document text
    • http://getyourcredit.info/what_is_the_book_woman_of_troublesome_creek_aboutni0st.pdfIn PDF document text
    • http://bioforcecolumbia.site/linksys_ea2700_reset_default_passwordyl7mx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_6053322f9c74b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_5fd1a954647ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423442/normal_60050b5063e87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482631/normal_5fed58ef79bb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/page_break_html_to.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/26814452414.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/raxubaruranigojadiwiraj.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/muwununobataz.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/estudios_bblicos_cortos_sobre_la_oracin.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/inbound_marketing_certification_answers.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_off000249bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x249BD 4936 bytes
SHA-256: 8dee03808f7e7a2d918c1ee2dcbebcdd9861f555433b1ca7e85954186ada3f42
font_01_sfnt_off00025a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25A76 11840 bytes
SHA-256: f2285ddd2515b2717cde29c31ee27bcabf0253cec12ed630addeb5c6d8c37524

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