Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3317e2d66d84a4…

MALICIOUS

PDF

79.4 KB Created: 2021-02-26 01:45:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 7a9c0109c38d51da8f3944db1432358e SHA-1: 4cb4b0fe907278f750fd4efaa752ec6b63102cd6 SHA-256: 6a3317e2d66d84a4025382a8f4e20ccb17d7f8f81cae7aa46b43b3b98ee21a40
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though partially corrupted, suggests a lure related to economics worksheets, which is a common tactic for phishing or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=applying+economics+worksheet+factors+of+production PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417664/normal_601a860c9f61f.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/how_to_change_day_in_casio_g_shock.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/parimidubujutopofi.pdfIn PDF document text
    • http://nakozek.mypressonline.com/m.sc_computer_science_books_free_download.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/27016489172.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/excel_vba_function_call_on_left-hand_side_of_assignment.pdfIn PDF document text
    • http://gk-kuban.ru/limukobekekitejezanuc0w80.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/jujalu.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/how_much_does_it_cost_to_fix_a_refrigerator_compressor.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/gadumagabusodel/secured_and_unsecured_loans_in_balance_sheet.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/communist_manifesto_book.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/5970374981.pdfIn PDF document text
    • http://mifojizu.myartsonline.com/lewuwotozimotaka.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/46093075046.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/chair_hd_images.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/adjective_phrases_worksheet.pdfIn PDF document text
    • http://jujageritoxo.atwebpages.com/how_to_translate_arabic_to_english_in_google.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/garujupev.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/2367615213.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_off0000f80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80B 5816 bytes
SHA-256: 5f67492d15ad1acb75b88a3fd73dd5c499f9a9d73b8bf45df34965c5fe8c652f
font_01_sfnt_off00010bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD0 10656 bytes
SHA-256: e88b11c81f931ecd53384bf3ce906a8ce8637a9605cc4bab4df5c4cb1878813f

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