Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9c1441e839452b…

MALICIOUS

PDF

67.7 KB Created: 2021-02-28 10:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a05cfb4db88122112e870ae4afba3382 SHA-1: 5cabeaf8f168eed0158aa2712b1f2c0a7bfbb0ba SHA-256: 6f9c1441e839452b20e04f45776ec4b5c17db80a489755f57c8fa48d0e998bea
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 0.9998

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://druttle.ru/wix?keyword=phet+ladybug+revolution+answers PDF link annotation
    • https://sekekipozikevaw.weebly.com/uploads/1/3/3/9/133997985/tamezasapopem-peliture.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/wibokutofe-vugedavosukat-waragaza.pdfIn PDF document text
    • https://pidodogifir.weebly.com/uploads/1/3/1/3/131383649/0106928fb07.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/united_limo_south_bend_to_ohare_schedule.pdfIn PDF document text
    • https://fibupodofakakov.weebly.com/uploads/1/3/4/4/134496100/49a4cdb7ae9cf.pdfIn PDF document text
    • https://fekakekofum.weebly.com/uploads/1/3/4/6/134656499/jizom-vokaxarirok-filomu.pdfIn PDF document text
    • https://jarubobukifali.weebly.com/uploads/1/3/5/2/135297267/rezugutirivabu.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/dojikiwuwivodobiviferori.pdfIn PDF document text
    • https://limotesatax.weebly.com/uploads/1/3/1/8/131871768/514a543e4b12bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jilevatawew.epizy.com/linukuzomusutifon.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/2447492225.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/35744593758.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/electrical_artisan_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/brother_sx_4000_typewriter_not_typing.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/itunes_hip-hop_charts_albums.pdfIn PDF document text
    • http://gigapexolazet.rf.gd/xovenadusixoronokanuro.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/garmin_vivoactive_5_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/munoweregixodaxoresav.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/12534151660.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_off0000cc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC69 5480 bytes
SHA-256: 6b240648212d7c6a0c84e898f162962fb8c542d1681b32916d6c400f8193f8b0
font_01_sfnt_off0000df1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1B 10248 bytes
SHA-256: e8bc2e03130eed240e844ba3b070ce65a19a94552c9201cb3c77a9be173978c6

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