Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b750ea70ef8c55d…

MALICIOUS

PDF

77.2 KB Created: 2021-03-06 10:27:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 9dc2e75dd3ecd4e79a51f99613da797d SHA-1: 91fb7df2afab6085bcdc445c4ea1b3b03bd1f489 SHA-256: 2b750ea70ef8c55dd856b8deb0c6b793f2371ddb40ec73bb9d90cad671c24ea2
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. An external URI heuristic points to a suspicious URL, 'https://fokemale.ru/strik?utm_term=introduction+to+analysis+wade+4th+pdf', which is likely the primary objective of this PDF. The document body is heavily obfuscated and unreadable, suggesting it may contain embedded scripts or exploit code, though no explicit scripts were extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/strik?utm_term=introduction+to+analysis+wade+4th+pdf PDF link annotation
    • http://topcreditmonitoring.info/search_strategy_template0iaqq.pdfIn PDF document text
    • http://winoorama.website/39373823892rkep5.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/37251994201ve297.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370053/normal_600103801b029.pdfIn PDF document text
    • http://bejegom.22web.org/jabber_for_windows_admin_guide.pdfIn PDF document text
    • http://gigewaxupupixe.22web.org/identifying_independent_and_dependent_variables_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454672/normal_602107ebf4147.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494136/normal_5ff905bd7db4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379856/normal_602effe62aa77.pdfIn PDF document text
    • http://tpdreport.com/toniwhfjv8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_602c8b30ca114.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/sizabo/diaguitas_calchaquies_informacion.pdfIn PDF document text
    • http://retuguru.epizy.com/30813944240.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/semantic_network_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/93420023985.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/97040350393.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/nier_automata_complete_ost.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/rubber_stamp_font_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/zadakuzorazaziwukipan.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/39429900168.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/job_aptitude_test_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/miraribamurisunimupor.pdfIn PDF document text
    • http://jegovogetaferop.epizy.com/rukebupofunud.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/6th_grade_worksheets.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_off0000f079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF079 5464 bytes
SHA-256: cdb48687006f972c977890d794b49e71160257c213facf729e043e667bb1d87b
font_01_sfnt_off00010324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10324 10576 bytes
SHA-256: 39674f58b2d83e242bf79109d69e393c5cca07a89f9b7fe1f48473955e12903b

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