Malicious PDF — malware analysis report

Static analysis result for SHA-256 04da36005782bfd3…

MALICIOUS

PDF

79.3 KB Created: 2021-07-06 19:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cae38d19da3f08cd7515ce906656abc9 SHA-1: fda03cb81cd7782daaa2852825fd18807e2cc5ee SHA-256: 04da36005782bfd3f847db428e05037b40c570242cc9bdd9651de1b7f679682c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a large number of URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://krisoc.ru/uplcv?utm_term=fast+and+furious+9+english+full+movie PDF link annotation
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6db12d72f---sukadevepilipowapebo.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/1194605483.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/31561e13355e58d7a8184074d1256ea7/riferuzefixepofofozu.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/sinotusevipim.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a85f47c8508---40741578163.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/lejagikamuvisudapamidiwak.pdfIn PDF document text
    • http://bakoca.hu/files/file/83616417649.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075786f0c433---bezujete.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/simov.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/5airtbmbk3mnv9cljrrvkiglm5/68217915434.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b8aad3b9128---1442669229.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/nefokigazowex.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/ac4a51586773adbe18dcb09cee49fbde/27027957412.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/wapuwejetofomudu.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/sixuwurolulojupop.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/tivibefi.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad354da65d3---sevirev.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/gezuxigawefijuxugi.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074af88b0a50---19019495702.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/zevarajirojasadumil.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba7d102863---45570127078.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_off0000d0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FC 17488 bytes
SHA-256: c56d34e047b5a6b1e063c43f884b7b0fd71b6b44bcf28ad63bce685f82c6812b
font_01_sfnt_off0000fe86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001169d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169D 11112 bytes
SHA-256: 150c9129dee065412e0f160bf1905dd4dd19c896344ef8d980544208e85dbb3f

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