Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dcef2f7c81ee5d6…

MALICIOUS

PDF

280.5 KB Created: 2021-12-27 02:10:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-30
MD5: 444fba348b5c58625a0b935bc572cc34 SHA-1: 26cf02158c229ef78b2e0358f7676e9918b261cb SHA-256: 1dcef2f7c81ee5d6eca6ed96bc3e9ca74e48cadbba0eabcbae48acb116df176d
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7806

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
  • 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.
  • 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.
  • 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 http://makeyourpartnermelt.com/userfiles/file/95383880761.pdf In PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1616830e16d64e---daluxisunukowuz.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/587e11205fe53a47076e21dfbbee2e48/lubakexegis.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161857d717969e---foxub.pdfIn PDF document text
    • https://terracell.info/images/file/22037283682.pdfIn PDF document text
    • https://krafteco.ru/uploads/files/pozewefawunig.pdfIn PDF document text
    • https://www.steyr-mannlicher.hu/admin/kcfinder/upload/files/29775641509.pdfIn PDF document text
    • http://fge-service.com/userfiles/file/56036545612.pdfIn PDF document text
    • http://www.valaisconsulting.ch/file/65849662088.pdfIn PDF document text
    • http://bikaji.zohukum.com/ckfinder/userfiles/files/80936007331.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/solofebifoson.pdfIn PDF document text
    • https://sikdercollegeofpharmacy.com/scp/ckfinder/uploads/userfiles/files/79213969922.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/dutijiwozumilegip.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/99452412417.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/82131135315.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/35087217770.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/8ee85b78730acbc7ad01d0119b24b5a6/14265445748.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/60509741759.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/95876550445.pdfIn PDF document text
    • http://gerocuki.hu/user/file/58779169064.pdfIn PDF document text
    • http://vangphutai.com/images/uploads/files/bugulagetubusajileni.pdfIn PDF document text
    • http://agaugservice.ukrkarta.ua/fckeditor/userfiles/file/64748364181.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/BcFPVxLj4jw/uplcv?utm_term=4+figure+grid+reference+worksheetPDF link annotation
    • 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_off0003f144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F144 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off000407e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x407E8 10808 bytes
SHA-256: 311eae27303956149f8a22ebc45a504fc54baa72ed36b5d1e14e83a401846e7f
font_02_sfnt_off000420a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x420A0 19276 bytes
SHA-256: 9e9aeb14b4725d62992f11d0ba48be69cf873384ef6e4d87fbb315351780e36a