Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d1c15ea86d3786…

MALICIOUS

PDF

530.0 KB Created: 2021-12-17 12:26:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: c5a645f697d51e1d7db891175ea8eb9f SHA-1: afd35a75576dd859d24b89147b1e075c63c4c042 SHA-256: c5d1c15ea86d378662ba2e0d563356e17763ea3b9f01d7146d936ecc41fbd3bc
144 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4023

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=risk+assessment+coordinator+job+description PDF link annotation
    • http://apart1day.ru/file/98599436795.pdfIn PDF document text
    • http://tvsatkrosno.pl/userfiles/file/boxirukefoxikozelu.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1616a0cc8c221a---fitiropifelulavut.pdfIn PDF document text
    • https://sananselmo.com/wysiwygfiles/file/farigulokipawifijab.pdfIn PDF document text
    • http://myepres.com/HotelEstimator/userfiles/file/nopukozevejunezebato.pdfIn PDF document text
    • http://dmychadla.eu/UserFiles/File/wisibajisisekenufufuradi.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/32660568952.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161acc266216f1---18061898860.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/v6n40u6iaekg9uisvqd13f2ig4/29897092336.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202110081045125488.pdfIn PDF document text
    • https://jv-cms.crazy-jessie.nl/uploads/files/woreninodakuzipojixosok.pdfIn PDF document text
    • http://shuswapfireandsafety.com/userfiles/file/81373154581.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/2665285298.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/l9o9863v48sme3ckkkppouc3cj/62665506462.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/molomozufikosuj.pdfIn PDF document text
    • https://hk-delight.com/UploadFiles/file/96374100870.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/3304448082.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/20990912502.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/bawiwefalujuwi.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/jedijovonor.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/003d28296d159b9c90eff1da22517fd0/98207988325.pdfIn PDF document text
    • http://chukguwang.com/files/fckeditor/file/39908950223.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/36123329713.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_off0007d792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D792 19020 bytes
SHA-256: e07f55a85f9f37cbbd3444863f71750b120d4161f93fdf50f3171adfe1bddf10
font_01_sfnt_off000808da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x808DA 11036 bytes
SHA-256: c4f7463945c6b305ce394983f9d0f8944a6ea78651ca7ac6993600fcf8979713
font_02_sfnt_off00082248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82248 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336