Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f71edc9c4f2d87…

MALICIOUS

PDF

271.9 KB Created: 2022-01-24 15:13:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: 4d6454bde188fe09bf88b89e242dd321 SHA-1: 61ccfd5954e645bb5495ec1e9db637fb895b82aa SHA-256: a4f71edc9c4f2d879014da4207c120218cd301d7406878278cf94544cab44655
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8620

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://coretry.ru/uplcv?utm_term=amnesty+scheme+for+stamp+duty+2019+pdf PDF link annotation
    • https://phnews.ro/files/file/92916631189.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/kemanetu.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/52499228349.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/18555271768.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/jn2906n7hk4gn2ftak9iu67fe1/foxadarelevinuv.pdfIn PDF document text
    • http://anitacalderon.com/ckfinder/userfiles/files/burujozilizivapefejabep.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/83f165c483e1996401dcd82f1480a993/51432300863.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/40602791700.pdfIn PDF document text
    • http://bikesport-krnov.cz/www/js/kcfinder/upload/files/99281946763.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/zedanupinuvunul.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613c501660882---87605417552.pdfIn PDF document text
    • https://balmbeach.hometeamcorp.com/images/usr/66516377936.pdfIn PDF document text
    • http://yilbasipromosyonu.com/userfiles/file/83603884810.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/pituxekolexopisu.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/40102697634.pdfIn PDF document text
    • http://apatity.verlauf-ekb.ru/admin/ckfinder/userfiles/files/97415607671.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/39416286931.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/sujemafoxaxe.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/161b17cc4e1f73---pegasegaraduwawekadexuz.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/161b0d3706687c---9403073312.pdfIn PDF document text
    • http://lemonsport.hu/upload/file/nurutijojanidofoburima.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 extracted file (font_00_sfnt_off0003d2fd.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0003d2fd.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003d2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D2FD 16624 bytes
SHA-256: f445d06ab3fe314aa3df5fc542fa50e3806ffe20668ab0abe9ef21a457bfe991
font_01_sfnt_off0003fe46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FE46 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off000414ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x414EA 11404 bytes
SHA-256: 1316814cfab5fc61e895e80a06ac6875c5f38cf2a6c6dd881c2b606160520c93