Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7337f9bc14cea83…

MALICIOUS

PDF

72.4 KB Created: 2021-05-18 09:34:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f5bacbf6040f6514fd454b46c1cf31ce SHA-1: 8c8436c18b896dd1cbe7234257ed69f13c0be6d1 SHA-256: d7337f9bc14cea83984c829675d0c68e13ad2e770e6c4ee1c71da7644347e321
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=ye+dil+kyu+toda+mp3+song+download+bestwap.in PDF link annotation
    • https://nifilova.weebly.com/uploads/1/3/0/7/130740060/reximeteme.pdfIn PDF document text
    • http://favovuzoxegavix.22web.org/52839964512.pdfIn PDF document text
    • http://guwugil.22web.org/accountable_talk_cards.pdfIn PDF document text
    • http://zolewuren.22web.org/kabuzeveweku.pdfIn PDF document text
    • http://vubanapet.iblogger.org/32056126280.pdfIn PDF document text
    • https://kubikogemovi.weebly.com/uploads/1/3/4/0/134095998/637123bd41.pdfIn PDF document text
    • https://jurisosisirebak.weebly.com/uploads/1/3/6/0/136086550/dd1093b63595.pdfIn PDF document text
    • https://repemokalit.weebly.com/uploads/1/3/1/8/131856723/0bcba794ba9619.pdfIn PDF document text
    • https://fumamefix.weebly.com/uploads/1/3/0/8/130873833/dizefiwasave.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/jaloto/personal_expense_tracker_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/sulosavebopubebiferej.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/gebudekarowit.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/learn_english_for_business_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/dunimikametafowesapavep.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/academic_vocabulary_toolkit_1.pdfIn PDF document text
    • http://kiguvikifofev.rf.gd/34551171769.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/the_50_questions_to_fall_in_love.pdfIn PDF document text
    • http://talanusedos.epizy.com/xevefi.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/dezadibakobitidutuvizasiv.pdfIn PDF document text
    • http://xuwewodufot.rf.gd/tixenabirazujosumi.pdfIn PDF document text
    • http://vajitefafuxuz.epizy.com/c_string_format_datetime_yyyymmdd.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/44259409353.pdfIn PDF document text
    • http://julisanusifi.rf.gd/nateje.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/husqvarna_rz4623_deck.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/how_to_setup_behringer_xenyx_1202.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/syncrowave_250_dx_error_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/98331092933.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_off0000dae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE2 5736 bytes
SHA-256: 37463ce4cc11684321e69e56ebcfd0fbf9629f38305880621f065b2e981d8d28
font_01_sfnt_off0000ee77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE77 10856 bytes
SHA-256: 0a278519021778dcb24fe1a3693903bb69ed4e30221e9a49c272e4d26bc7aed9

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