Malicious PDF — malware analysis report

Static analysis result for SHA-256 9114c41b3a4c5dc0…

MALICIOUS

PDF

73.8 KB Created: 2021-04-08 04:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c713e6e1ffec78686cbe02f7b82928fc SHA-1: b07345fee053649331d3c1b352752453719fb7ed SHA-256: 9114c41b3a4c5dc05fd48a6821c7d39b1cb2b851efbcef5c3b2374dc518e1af3
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'calories to joules worksheet', a common tactic for phishing or scam attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://druttle.ru/wix?keyword=calories+to+joules+worksheet PDF link annotation
    • http://s7hmus.org/biblia_romanaj355e.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/sex_education_in_schools_debate_pros_and_cons.pdfIn PDF document text
    • http://supportcopyright.net/how_to_prepare_your_cast_iron_skillet498aq.pdfIn PDF document text
    • http://bilkan.fun/feedback_sheet_creative_writingpnh6l.pdfIn PDF document text
    • http://retamos.mygamesonline.org/pdf_alternator_manual.pdfIn PDF document text
    • http://fruct.space/32238195653upxjg.pdfIn PDF document text
    • http://profibrend.ru/myles_munroe_net_worth5t454.pdfIn PDF document text
    • http://dufazesiz.mywebcommunity.org/attachment_failed_gmail.pdfIn PDF document text
    • http://fonivoguko.medianewsonline.com/audience_analysis_in_communication_skills.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/90681269586.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wokidomogu.onlinewebshop.net/tovisasulifog.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/anniversary_song_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/32693088003.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/zugominezawa.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/danubasusokipuke.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/7704227364.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/bar_graph_worksheet_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/tusepegufujonuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/public_financial_administration.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/57687157692.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/what_foods_make_up_complex_carbohydrates.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/xigifo.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/what_is_the_punishment_for_prostitution_in_us.pdfIn PDF document text
    • http://zutaturusix.myartsonline.com/electronic_components_parts_and_their_function.pdfIn PDF document text
    • http://velelakolifuvu.onlinewebshop.net/differential_diagnosis_appendicitis.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/give_the_rules_for_writing_scientific_names.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_off0000e1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AC 4908 bytes
SHA-256: b9e2da5f512cd31e6ad6c1dc8bb36cb85e326a3e773a5d21e7b75d8b61ba3095
font_01_sfnt_off0000f261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF261 11492 bytes
SHA-256: 236a7cfa7f4422d1cfd617b15c28b9fb646c64506e01aa91e635a90e4bbffe71

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