Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ecf73c5becf8890…

MALICIOUS

PDF

86.8 KB Created: 2021-03-20 10:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 76e5c8ab8f51ce36e83f36b722af9004 SHA-1: 1018a928d5e9c60ff6d586c03deedcc6fdbe439a SHA-256: 5ecf73c5becf8890acc02689984985bd4067f8ccef5de06e6cdfd4f298dedafa
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 suspicious domains and are likely part of a link farm designed to distribute malware or phish users. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates this behavior, and the ML classifier strongly flags the document as malicious. While no scripts were directly extracted, the embedded URLs suggest a pattern of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/award?keyword=exercices+avec+les+articles+contractes+pdf PDF link annotation
    • http://wulixiv.sportsontheweb.net/migofuxowalidakusivetasuv.pdfIn PDF document text
    • http://reduslim-eu.site/ivanka_trump_height_in_inches93f29.pdfIn PDF document text
    • http://1xbet-registrat.site/18632523880x9nce.pdfIn PDF document text
    • http://fikepoj.22web.org/xekinetutelatodenekibisoj.pdfIn PDF document text
    • http://strongcreditscore.info/how_much_are_star_trek_comic_books_worthpanzb.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/99397549227.pdfIn PDF document text
    • http://movajapenakinu.22web.org/bootstrap_dashboard_template_bootsnipp.pdfIn PDF document text
    • http://wudebakafepi.mypressonline.com/sat_prep_book_2019_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wupafar.rf.gd/14864111897.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/tofaliduwinojum.pdfIn PDF document text
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_1320d486419d46aa89f39392a33bd3a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pazatuv/how_to_program_rca_rcrn03br_universal_remote_control.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/57858141130.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/4_pics_1_word_level_2481.pdfIn PDF document text
    • http://jaweratiz.atwebpages.com/agile_testing_condensed.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/xifobedivafoku.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/2261948834.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/causes_of_greenhouse_effect.pdfIn PDF document text
    • http://bebezira.epizy.com/96973980895.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_8adeafd0caf44ad5bf99b83489f5937f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/pojava.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/word_template_calendar_july_2018.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE2 5236 bytes
SHA-256: daf4a7c579cad772226ddef383cd35a7c4e5fbedaa1792cd3daa99f9a8792611
font_01_sfnt_off0000fec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC7 2884 bytes
SHA-256: 5c558618dff369c2b900462a2c05a26cd535293f5b4c043723e2c7e55145be0c
font_02_sfnt_off00010ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD3 13484 bytes
SHA-256: c79799a4b490747ef0bdbf48e1d4d0d048014ee48aabd0ea9e0f70bc7807d58e
font_03_sfnt_off0001359a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359A 16208 bytes
SHA-256: c691c2dc236ff1c3149f8178f30dcb30456d959af2bd230901b395ad55359d31

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