Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2e98a106124ad8…

MALICIOUS

PDF

1.25 MB Created: 2022-05-31 09:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: f4e42903498a7090728d8afc5e6f5160 SHA-1: 8857a4dec03e2d9ec1b07fd0d9716893d52c541d SHA-256: ca2e98a106124ad8bfc3ff8b747a3f86484f2ec00edacd597227ba0cb850b467
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains a link disguised as a free download. This link redirects to a malicious URL, indicating a phishing or malware distribution attempt. The ClamAV detection further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier clean score 0.0866

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://fecuq.co.za/XSRYdR1H?utm_term=euromodelismo+pdf+descargar+gratis+online+en+pc+gratis PDF link annotation
    • https://tevogufolug.weebly.com/uploads/1/4/1/3/141350440/6742211.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/gorasolinuxawilevof.pdfIn PDF document text
    • http://nineslash.com/user_file/file/pijitopopunom.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/30781232438.pdfIn PDF document text
    • http://abb-impuls.su/kcfinder/upload/files/94593897236.pdfIn PDF document text
    • http://moonyart.ru/admin/ckeditor/kcfinder/upload/files/rakaxoruxiz.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/zozanuboditusogitapakozam.pdfIn PDF document text
    • https://tavikumor.weebly.com/uploads/1/3/4/4/134476146/molitobikapiwefi.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/10934298110.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/10544388847.pdfIn PDF document text
    • https://defyinggravity-afs.com/userfiles/file/72453913907.pdfIn PDF document text
    • http://sankoux.jactokai.net/kcfinder/upload/files/99700096020.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20220407121221.pdfIn PDF document text
    • https://ckv-siemreap.org/ckfinder/userfiles/files/84989100348.pdfIn PDF document text
    • http://pellevah.com/upload/files/17571875446.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/gepogutiwaloladopoweb.pdfIn PDF document text
    • https://awarelaxcentrum.cz/user_files/file/repamupokuxebijotoliliw.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/89238514211.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/9ab204d88c0c57378316c8cbbcd7474e/sewuxijeboxi.pdfIn PDF document text
    • http://nextlab-semi.com/files/fckeditor/file/5518436018.pdfIn PDF document text
    • http://sassanoproperties.com/FCKeditor/file/22625803552.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202205211007279570.pdfIn PDF document text
    • http://timapools.com/uploads/file/begimanoboxifez.pdfIn PDF document text
    • https://tetoxoji.weebly.com/uploads/1/3/0/9/130969306/2047728.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/132029664c8216d37446258e9deaca0c/59823279612.pdfIn PDF document text
    • https://lobusuzagoti.weebly.com/uploads/1/3/4/4/134470260/1086605.pdfIn PDF document text
    • http://www.sgpm.krakow.pl/aanewsysn/kcfinder/upload/files/kerepozonavi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00137896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137896 18544 bytes
SHA-256: eade995877dd7d107c1ddf8ed9336d6ad718c77d5731ded443bc2dec5287abf5
font_01_sfnt_off0013a875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A875 11044 bytes
SHA-256: 1e3f54c911fe925253ee8ed7c112959277bc3ba6225bb55f81ebfd03d362a037
font_02_sfnt_off0013c1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1