Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8af6d36bb34fb7…

MALICIOUS

PDF

388.7 KB Created: 2021-12-26 19:30:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: 3c8df9da723a849602d44d7663728af0 SHA-1: 331cfa2dd8a0f8490045c883d21623f7abdf778d SHA-256: 5d8af6d36bb34fb705515fc93bf1f440184e5e22e84e47b2946627f841cebbf1
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8248

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 https://crewmak.ru/uplcv?utm_term=aeroporto+area+restrita+discovery PDF link annotation
    • http://jujucuisine.com/userfiles/file/9899970447.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/logalet.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/tejokajezubaponisuvobevo.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1619ff94b4c128---90336957395.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/29440509676.pdfIn PDF document text
    • http://www.chulapd.org/administrator/libraries/ckeditor/kcfinder/upload/files/88079412156.pdfIn PDF document text
    • http://duythuc-bearing.vn/uploads/userfiles/file/makimavokizupag.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/35817370954.pdfIn PDF document text
    • https://karlschool.org/uploads/files/202109061605092370.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/21726487300.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/39288444408.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/647427dc3fdb9ded51c87129ae87c4a1/47230158018.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616f670a3d9aa---98140623080.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/gumujakekema.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/95598082977.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/351f95887058c03ff0a5db860b9bc752/2374504696.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user//file/_0558833001636827089.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/b67ecaf698f1da9c3dd1d7674c467757/nidolenijoxujafusesukine.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/161a1ba7702cf2---44229206260.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/33749503363.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/csus3grkvl3jhosnuih0nuc7lp/givumuxikeduzuxivuvevajol.pdfIn PDF document text
    • https://g-tet.com/uploadedfiles/file/2275382680.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/44195673898.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_off00059f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59F78 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off0005b61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B61C 10516 bytes
SHA-256: 2e9ab909e5a5b8922ff31ab9b29c49dd4703f9b94f2c240efdfc719f399fea68
font_02_sfnt_off0005ce3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE3F 19972 bytes
SHA-256: f793bf991337eb9c30f284cce9a6b2f19fc4301c0b8af05b814fd33edcc05950