Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ed9f75b9c89005…

MALICIOUS

PDF

84.0 KB Created: 2021-09-01 06:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7621185d49edd26d88bfdc209f98b22b SHA-1: e6a91d1b5bff15891583ff24f8bd1c61ba1cc533 SHA-256: d2ed9f75b9c890055a90476f88011aa2db9908ae0c677aced3c02487ed43d750
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary goal appears to be redirecting users to potentially malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=long+distance+relationship+pick+up+lines PDF link annotation
    • http://wmsone.com/eimages/file/kumenixerepogiri.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/kqgku7137foid8vsglvf73q3gj/70510906315.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/c1ef5429ef448123230747b499ce4b27/20800567336.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/i0iv1cros0h4qim0jlbe2okso9/wobedategijapo.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/vivabanewonilugenadofago.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/55928932072.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077505599e55---84291684997.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/74368935746.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/369ee582bd8dab159faf189fe8f809dd/nugenidikofubagipurepu.pdfIn PDF document text
    • http://machin.kr/userData/board/file/17840271757.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/rulifubolifamijozunexebe.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/rapajitovusunotafudesavu.pdfIn PDF document text
    • http://thanhcongtechtra.com/upload/files/40778977924.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/81413087444.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/36653186706.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/12551761822.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/vatetel.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/1v2fh48svmsh38st550ttuj347/17111938111.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/72404088192.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/d4ce1f879b014f6bc18d00707fb71fa9/giveben.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/5124735712.pdfIn PDF document text
    • https://eetravel.net/file/71325109162.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_off0000e1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BC 10940 bytes
SHA-256: a39b63dde0155ad9be12e23f317f783ab00447a6d2fa5f4a50afc8dac244dd02
font_01_sfnt_off0000fada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADA 18236 bytes
SHA-256: acbba8c2ea979305626881b6d267b22fb2e457bf3469346acb326586422bd950
font_02_sfnt_off000129a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1