Malicious PDF — malware analysis report

Static analysis result for SHA-256 76bcde0171c3be74…

MALICIOUS

PDF

84.5 KB Created: 2021-09-06 03:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dab639094c73e9810a7f77c6d7b3121b SHA-1: 18b3e7201f6d1a719cdb7a75501d68137ed94912 SHA-256: 76bcde0171c3be747526dff676872bb619416584e5c81c542280cc2275415150
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting. Heuristics indicate it functions as a link farm, potentially luring users to malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, suggesting it's part of a phishing or credential-harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dalyanestate.com/userfiles/file/neriguxiwoxutuz.pdf In PDF document text
    • http://songhandiban.com/uploadfile/file/2021080421573873499.pdfIn PDF document text
    • http://oodow.cn/upload/file/210621021023357195f57gnx4k9wuz.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/bd5269ed4f4f1ee05206463065fc4e14/vivefefeku.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd30f52d56---kuvexiz.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b5bf9d31f---zuvezujusibudoto.pdfIn PDF document text
    • http://vieclamquantri.net/upload/files/xufigojojeba.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606d84275dc8a---sikepinesorewimozikile.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/91954954040.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/bigimujeboribekitekulevu.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a1b35ff49---sakinunavipajetarinapip.pdfIn PDF document text
    • https://yildizwebpaket.com/calisma2/files/uploads/71837773293.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161165986b7774---dedejaseboxox.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/uadmgehtmkcdeeae7tvgiqu1ib/6798560100.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/6sqd1ivka5to7mlbipluko4m3l/95518542063.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/ppmgfc1l2hm65pgjri88ar8uju/pusokokisixubekuzinamukad.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/5931653122.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/27417318984.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160805cba4cc45---duwosejupav.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/92692553542.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/zugilinaj.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/d497f35b51d128886d707f68f5ea0a01/sufaxubiturebuxufumileri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=genograma+ecomapa+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27E 19460 bytes
SHA-256: 601abc61526ad104466d0ddf9fdbf2c7b8e854c1d9506f23f62405ae2698cb14
font_01_sfnt_off0001146b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146B 10600 bytes
SHA-256: c2546121310d21521e1f40e261629a13e2ad6a75b629ca226f75d341118f5ee4
font_02_sfnt_off00012c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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