Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4414ecee9f6e360…

MALICIOUS

PDF

74.5 KB Created: 2021-09-23 17:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e8de295e83482f13cb24c124cb303819 SHA-1: 649b2695b40b8fd9db4c3fca2960f1745ef2523f SHA-256: d4414ecee9f6e36018f5f2133a872809a531823795367387a19a96ccea3f8578
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pistant.ru/uplcv?utm_term=desiigner+panda+video+download PDF link annotation
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/ec0a6fd48e54e66671294281882281a2/27770440095.pdfIn PDF document text
    • http://srcchaika.ru/files/uploads/files/nisajoru.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/52154948191.pdfIn PDF document text
    • https://maychieuvinh.vn/upload/files/9945094182.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/26484438580.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/waxeruwetitekififeramu.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/gexasorat.pdfIn PDF document text
    • https://junona.manyel.website/images/uploads/medium/69121168640.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/keletofuj.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///38416489117.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/62771896018.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/tibebopezozifixad.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/liwejuturuvaveluluje.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/kiwudatikapuvudozas.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/14041346581.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/87429619145.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139f45280987---nefejudiboledev.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/delapibimonubu.pdfIn PDF document text
    • http://erh-hu.com/userfiles/file/1928493497.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/7ccb5c126fbd61cbaab29acc00a03c73/51681002133.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/jepenelokapuboxerulizegov.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/88067702161.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/dotapetutepidugozifuza.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_off0000b78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB78E 10624 bytes
SHA-256: c7ce9f535fab5ba49a9f24e1ef355fbb7c5730aa27e27d999452248fc576a52b
font_01_sfnt_off0000cfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCC 20252 bytes
SHA-256: 991936ae4fb4892e082db718a00767955bec2b092b3f4ab4bd38f5e7db665eb2
font_02_sfnt_off000103e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1