Malicious PDF — malware analysis report

Static analysis result for SHA-256 430e7bbc94df4e4c…

MALICIOUS

PDF

85.0 KB Created: 2021-07-03 09:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b823fa8d123c46df8750f0eeb5fda751 SHA-1: 1ec9054e8cb761ca99bafd38751256c3601c3a07 SHA-256: 430e7bbc94df4e4cdd4413f790b81390b9e4dab01ab2afe57e65166dd28e2644
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=how+to+delete+songs+from+ipod+shuffle+without+itunes PDF link annotation
    • https://allcreaturesinc.com/files/files/55615475583.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb12cd8f0c2---suxomal.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/48thlq7k99r05fp6p03j1klj8l/gesep.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16083469b36d10---81188846081.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/89685720322.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/84242ba05a9bda6b636cd9fe1641b064/bowokorar.pdfIn PDF document text
    • https://clubsportedinburgh.org/userfiles/files/vebofagubiruwigor.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/185f512bd71ce1ddba3a35a0055fd9df/33614070790.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/72452288616.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/kudiwavupoxa.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/rukitapamomelis.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb180359d8d---41815136676.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/265bd6bed21963e976e0d02b348f1c88/tupivajibunufovoki.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/zoxaziserixeribufa.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/dugebixe.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/5f7de41ed913716906dd8a018cace209/bezuk.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9e52b7bc8---95606354409.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/08471a5543611dbdc9e9c85182753a68/11519628235.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ffe2275c1---kogidigu.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721cac1765d---16963649934.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/a7pq5ad21bhn5r1qta6jo19on4/30259028478.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/70574401988.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/edeab67f13e8063aafb6fbad72ba6f9c/bumoxuxu.pdfIn PDF document text
    • http://kbchina.de/upload/ranukeso.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/250350f615d3314508aed8488316cc04/91839864035.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_off0000e977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE977 16784 bytes
SHA-256: 369bc7f81247884c2a61b0a55e8381a8299c56e2c633a74a8424f4523b33b4c4
font_01_sfnt_off0001153f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153F 10960 bytes
SHA-256: 4fb87da755689ac7b109c19c96869ea2eb595f5382e38882a13ec4c66a8d8e58
font_02_sfnt_off00012e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1