Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6e298e7940ba0a…

MALICIOUS

PDF

77.8 KB Created: 2021-03-20 05:33:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f284a6658e5829cb124a5efbfe44a920 SHA-1: 20ceeb6c648629be40524d69dc45926697cabae9 SHA-256: ec6e298e7940ba0abf1cdbe1fdf2e9a074a0e7704fb6011be3d3376574faa245
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, a common tactic for phishing or redirecting users to malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'dafemum.ru' as a known malicious redirector. Additionally, 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting an attempt to manipulate search engine results or distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/123?utm_term=australian+gold+rush+information+for+students In PDF document text
    • http://kimagibasip.22web.org/pubonizepifagusesi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471946/normal_6001c86bb5fe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_602645c244cd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385620/normal_5ff0f782cd754.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_602269450997c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457312/normal_600083663f7f6.pdfIn PDF document text
    • http://metinozub.iblogger.org/60585159262.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/womirofop/stylish_alphabets_images_a_to_z.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/pufavapiku.pdfIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_82418c41ef414255a6dc7cdab91269cc.pdf?index=trueIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_a95a51a2d667472da14eada3b33d0d66.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dozore/5703420466.pdfIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_5f39ae237fea442ca31c65b416277b46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/39836759788.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/cambridge_checkpoint_science_coursebook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/who_is_the_song_stairway_to_heaven_about.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/futos.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/deaf_tend_your_non-manual_signals_in_asl.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_off0000f134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF134 5308 bytes
SHA-256: 6fdc16dc8e06ba4fcd76f0ed1831d82dcf0b143b3ad4c3723712ed04b560592e
font_01_sfnt_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 11512 bytes
SHA-256: 9741e9df317335431629d9fe8c59dd53c7e56b87888de73fbcf2f58356c20191

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