Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a54714d3e1aa2bf…

MALICIOUS

PDF

79.7 KB Created: 2021-09-03 15:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a95e48d2bd26a94308801cac0f723138 SHA-1: ca591d00036ef400c9388c5f0c3edc419f4f4d18 SHA-256: 7a54714d3e1aa2bfee83edd5c4dce6af37851b457f4fd9a1a608f1a69c71c82f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms or disposable domains. The presence of these links suggests an attempt to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://queure.ru/uplcv?utm_term=admiralty+court+act+2000+pdf PDF link annotation
    • https://kurishupally.org/userfiles/file/18118281463.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/34478792860.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608abaa13abc7---87609566745.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/1c7022c3a81b1b7a92aeda63312e3caa/48280134023.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bae3d5438---73675173034.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/lefom.pdfIn PDF document text
    • https://lavaecucebrescia.it/file/kekaxulosufemitutomas.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db7dd25cb8f---3606120351.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/e2bqlgepgfaei8ga8aed9u00nb/3408668940.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c49e9275e3c---vikafowedajawumin.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/fm4f12f61s4k0cmmf82vlb0n3v/78541214928.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/xolazapeziwu.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/70024642172.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/saxibedanalizujoxaxed.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/72949790067.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/fedilafugedisizewiwiz.pdfIn PDF document text
    • https://www.kindspring.org/inc/ckfinder/userfiles/files/89717878720.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/32979961129.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/revitadi.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/fd06e20f30c8a86f186b13f36bfcad86/durexovo.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/5a67c3ce40641a5dd4401c9eb4be1afe/92949588097.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/50539391183.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/kevorif.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_off0000d3d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D1 10816 bytes
SHA-256: 155fe0a38bb4f519cd9ee19c1d8954ddb1e9d59c455f716b068f98da336d1919
font_01_sfnt_off0000ecd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD3 17424 bytes
SHA-256: da0f5b9a09a8264cf01fce24fcb1ae62aaf3f031e28bcfe254f8b06d27a36709
font_02_sfnt_off00011976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11976 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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