Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb0bb10b032b753…

MALICIOUS

PDF

73.1 KB Created: 2021-03-07 03:25:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e9b692d66510db76c340b21061adbfcc SHA-1: 8cf1175579a3110299b4c43f15b4638b1e3673a8 SHA-256: 3cb0bb10b032b753bb8c5504aad79834a366a64eb2d52f8c4ae0a5eeea558da6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The primary URL, 'https://xajibur.ru/strik?utm_term=wordly+wise+3000+book+4+lesson+11+pdf', is presented as a search result, likely to trick users into clicking it. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://xajibur.ru/strik?utm_term=wordly+wise+3000+book+4+lesson+11+pdf PDF link annotation
    • https://cdn.sqhk.co/nuxezitowefi/eghhhie/600_to_800_words_is_how_many_pages.pdfIn PDF document text
    • http://nepifenimet.iblogger.org/94387990119.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/Rjajdhc/fantasy_flight_games_talisman_board_game.pdfIn PDF document text
    • http://wisevesimo.22web.org/46231043749.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/hfidcic/26423237832.pdfIn PDF document text
    • https://cdn.sqhk.co/zibavuna/cj1gfQS/this_is_the_police_2_walkthrough_part_1.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/JrhhrjZ/warlords_of_draenor_flying_9._0.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/tonisefoteka/alberton_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/offline_android_games_like_modern_combat.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/genufelimulikireferozi.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/wabiladisaronuwebup.pdfIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_70dadfba0405425faa0ea55564655563.pdf?index=trueIn PDF document text
    • http://vemesivudaro.epizy.com/84027106092.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/headfirst_for_halos_piano_sheet_music.pdfIn PDF document text
    • https://a49a6154-edc8-4132-95a2-c7bb8d673fe9.filesusr.com/ugd/551169_a9ef6c0960b8444e9d88c06e19593a0b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazixipame/letufezo.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/balancing_equations_worksheet_answers_1-37.pdfIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_df0fcc9f27a04b65a6a630b833645448.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liwara/chockfast_orange_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/biblical_fasting.pdfIn PDF document text
    • http://pekesapawej.epizy.com/sopipipemivatolamu.pdfIn PDF document text
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_3bc78c853e0d451f96ff2df69b43e229.pdf?index=trueIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_5b2b9e875aba48c7b9d101bd15ebd1a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/leave_me_alone_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/optiplex_760_video_card_upgrade.pdfIn PDF document text
    • http://gizogebinide.rf.gd/zifudibi.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/columbia_river_fishing_report_august_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/52181267507.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_off0000df3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3D 5684 bytes
SHA-256: 8a46fd248dd9774ebd47dc32260e562adebf6ee24239901e8ea828de90f9240d
font_01_sfnt_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 10424 bytes
SHA-256: ae1d22cad960711e9c0c3c6c77479c6b89facd9971b63aa315ed0d113e034a9f

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