Malicious PDF — malware analysis report

Static analysis result for SHA-256 50748cc411c7953a…

MALICIOUS

PDF

73.6 KB Created: 2021-03-08 15:34:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2b8bc4e7f174cf5f3060360aefb35dbe SHA-1: 773159dae2b8d249ca0c9c4a09b00e26f9305360 SHA-256: 50748cc411c7953a579d6777d3f89261e852241ecc78ecc43bf28841be4b3b4a
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'xajibur.ru', which is likely part of a phishing or malware distribution scheme. The document body, though partially corrupted, suggests a lure related to a thermostat issue, aiming to trick the user into clicking the malicious link.

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://xajibur.ru/strik?utm_term=why+is+my+thermostat+flashing+a+flame+symbol PDF link annotation
    • http://lnstagram-office.com/java_design_patterns_interview_questions_and_answersppym1.pdfIn PDF document text
    • http://esmoney.site/95353559884gfk94.pdfIn PDF document text
    • http://icily.xyz/91059096144qw2ty.pdfIn PDF document text
    • http://nejamaranidirit.22web.org/luwigagotadak.pdfIn PDF document text
    • https://cdn.sqhk.co/sajatanugeg/hjhdeGN/epic_games_support_twitter.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/id3chje/10287193384.pdfIn PDF document text
    • http://jaraxusej.iblogger.org/city_skylines_campus.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/OIRathc/36245735887.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/what_size_file_for_455_rancher.pdfIn PDF document text
    • http://muxiguf.iblogger.org/acc_statin_guidelines_2018.pdfIn PDF document text
    • http://bagururidafu.22web.org/diatribe_crossword_puzzle_answer.pdfIn PDF document text
    • http://damvglaz6.xyz/10778981047fl8m9.pdfIn PDF document text
    • http://tekplafond.xyz/how_to_read_the_wisc-v_resultsyy5cp.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/mawesenasijoser/show_2_excel_sheets_side_by_side.pdfIn PDF document text
    • http://kanisisasulaba.rf.gd/bundelkhand_university_phd_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/webegekubivaranexotiletus.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/19710732046.pdfIn PDF document text
    • http://nibizuladode.onlinewebshop.net/rinnai_gas_heater_error_code_11.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/90736368906.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/bodoguter.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/the_ones_who_walk_away_from_omelas_book_depository.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/99769445774.pdfIn PDF document text
    • http://sujunutab.atwebpages.com/nugafojesubibegofemafoson.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B0 2900 bytes
SHA-256: 68d094faf81d2ea9f62e68ee4e789e40b6192f27e323b9e50c58fbaa8f881837
font_01_sfnt_off0000e0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F3 5436 bytes
SHA-256: a32b7f63b5ff581dadfdd13bfa86c4cf9e53e6afecf215ace5288b51c3859ad7
font_02_sfnt_off0000f35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35D 10304 bytes
SHA-256: fc9db903f42b5ef9df0a93e082aaaece5b30ac97e46c4dbcf0c35327ad62cd52

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