Malicious PDF — malware analysis report

Static analysis result for SHA-256 e576c917bda5ac91…

MALICIOUS

PDF

74.2 KB Created: 2021-09-03 14:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 69b453b993fad37c669f4f143fb09bbb SHA-1: 014a2c99df92f34326af47cded0bbe009973bf2e SHA-256: e576c917bda5ac91d26008fe154824e89798668a1a8fbcfced179d07b9265081
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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://ketchas.ru/uplcv?utm_term=guide+dogs+for+the+blind+puppy+training+manual PDF link annotation
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bccb8621c---dowiluj.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/rifulewakuridafefoz.pdfIn PDF document text
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/xozakilupegavagikigagele.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/1897fbb6102d2a4f3a16465eece8c432/baxasedewidiluzatedakesor.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1610059dc8b25f---82198047945.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a71fe17ae6f---vizedofaxogabuzulibiken.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/97022274fa6cfeaa11059ec9512a7c6b/zujulofonuwidediki.pdfIn PDF document text
    • https://specializedfacilitymgt.com/public_html/userfiles/file/63452865338.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608471d4beb43---99371639341.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/55866576645.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128aaa74a2ec---9504772500.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/n0bomimce3bu4e5ggn6igbf1dp/20531944603.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/27c17bb05c9cf67285e0a6b84f03143f/60082841212.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6b4f0ec73---vixetonepeg.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/18559443428.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/5910405478.pdfIn PDF document text
    • https://biographiewerkstatt-singer.de/userfiles/file/53231458980.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/40d99e1d68fdec3a0e5c51cccfe36cce/87746656955.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f306e84552---tejinibubunifa.pdfIn PDF document text
    • http://101balkon.ru/upload/files/55828134486.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fa8ed269648---41194700980.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/34775740942.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c738a060b77---kaxidenut.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/dagines.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/f8ef4dffaa3ff1ad8e841b1faaba0459/kiguzelubutudutofobe.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_off0000c1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D5 15372 bytes
SHA-256: ccf885f2c97246312f9f5fae9f09827256e94d2eb3a9d4eb5778395a33f49f9e
font_01_sfnt_off0000e8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CA 11336 bytes
SHA-256: 3e4ccf3353c0ac50004fc0c84f44cedb5a09e09c4ced39a9502baa7b659d501a