Malicious PDF — malware analysis report

Static analysis result for SHA-256 87573ed6319c6dfa…

MALICIOUS

PDF

71.9 KB Created: 2021-03-21 00:39:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0773005de61871d9d5711ad41a4955d3 SHA-1: 59b7aa03146b68aa8b5daefd8718271ccf3e22d6 SHA-256: 87573ed6319c6dfaa3f0e7b05e6ba802a38b1978e0ec21f37a784632780c226f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting it is part of a link farm designed to direct users to malicious websites. The primary URL identified is 'https://dugedepap.ru/wix?keyword=1+qt+plastic+container+with+lid', which is likely used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=1+qt+plastic+container+with+lid PDF link annotation
    • https://pujawemufupu.weebly.com/uploads/1/3/2/6/132680931/kefule-xexepux-soxupow-notusino.pdfIn PDF document text
    • https://nurosizakudagag.weebly.com/uploads/1/3/4/6/134699554/5366253.pdfIn PDF document text
    • https://tumipipap.weebly.com/uploads/1/3/4/5/134598024/mefemoxibam.pdfIn PDF document text
    • https://vazagivire.weebly.com/uploads/1/3/4/8/134874695/nonuserek_gaforaxikologix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lipabarud.atwebpages.com/ansys_acoustic_tutorial.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/commodore_64_computer_compendium.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/fasegusilizezugodu.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/77041923107.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/82863121624.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/handwriting_without_tears_a_plus_worksheet_maker.pdfIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_21257e8f1e784067bfa6b5fcaad98e09.pdf?index=trueIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_fde30895c4e143ec99ca7e251eae1de1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/55585385440.pdfIn PDF document text
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_8b69dcca4acb4b908426a32735552d05.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/70999808404.pdfIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_96bf79b812b24047a0ef442ffea1fc06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vufupu/aircraft_registration_application_form_8050-_1.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/91961609450.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/noluvaruxuki.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/daraboxevamirogup.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/bekhayali_kabir_singh_video_song_free.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_off0000db9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9D 5336 bytes
SHA-256: 83039880c8b028db783eff45f5be214257452c98f55c2076c755b4f45191581b
font_01_sfnt_off0000edcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCC 10788 bytes
SHA-256: e6f586502602300c75715abc5a8701d7d51947c78735203eb81cc9fd3efc4783

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