Malicious PDF — malware analysis report

Static analysis result for SHA-256 24235a8974f8a015…

MALICIOUS

PDF

204.3 KB Created: 2021-06-26 15:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 40e9e792ab97c2ffda8d0b630d543a61 SHA-1: 48e3db2d6a43a3c94d663acebb4a0c175856a389 SHA-256: 24235a8974f8a0154cdb1525755ead677ae5fa4346c1b52f5b7b226698fe3202
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it's a phishing lure, specifically using SEO redirectors to disguise malicious links as free downloads. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs, particularly those pointing to compromised CMS uploads and redirectors, are key indicators of the attack. No scripts were extracted, but the PDF structure and URLs point towards a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://smidgel.ru/uplcv?utm_term=george+herbert+mead+theory+of+symbolic+interactionism PDF link annotation
    • http://project-lovcen.me/userfiles/file/55312068732.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/wereseta.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/xijaf.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/ca278994c8146268f1dcad16b3c15a86/20823122590.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/cfe8d30986cee0aa7344eaabb5460584/86610243431.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/5e2684b3be9eb532ffce5fd3006f2434/ninifavimudu.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/kizimigi.pdfIn PDF document text
    • http://4bx.pl/public/file/baletopeguzemigo.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846441c004b---junewukanarizuk.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abd1ed5974---foduzexirofelir.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/78464746831.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080062fd2163---54283294865.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9c4e57a11---minagagemobevem.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba528a367d7---71386889366.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd152297fb---45311233751.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/reros.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d2517e53c45---falematamabovepug.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160baef4ed83b0---xosuxibazutu.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/764e51f4c0a50942679f4a1da6d4e8d5/76451083339.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/26955082733.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609d66577935f---telekowipas.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

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_off0002c314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C314 11216 bytes
SHA-256: 4bc7630753e9c73381c6a2e4985d3bcd2cfaf3bb305e4cf7fe0a98fa17e4297e
font_01_sfnt_off0002dd02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD02 17444 bytes
SHA-256: c886405f3763bc64efa1840d5594f7a369f5e97949a67f0f6411865a94405558
font_02_sfnt_off00030aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.