Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b963545c6bd3e8…

MALICIOUS

PDF

89.4 KB Created: 2021-07-22 14:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e0073267446e487db8f76e49dd2061a2 SHA-1: b79d59b9537d3f62102edae20b8af8317905dd75 SHA-256: b2b963545c6bd3e83249cb4c623dc0ee514aee8a10a9bdaf22a77bf8765178a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as lures for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/23a0b476fa3194848f9d0c30711ba9ef/29292802187.pdf In PDF document text
    • https://mobilieroccasion.fr/uploads/file/xolopujojavivepane.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/xutalodebutusutadixe.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/vg6cs9tkv95i6a095j6ik9pq7e/88124316257.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/73142935746.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/1a410410513d56b59656bc5bd1f2a256/ligefatid.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce2900e8666---fetiliruxixifixisureg.pdfIn PDF document text
    • http://miguktour.com/FileData/ckfinder/files/20210622_D25FF0BEF2275859.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072d329cbf82---xixalobepaxesepejomuzuna.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210629094724736.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/37156562419.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/riwukipakofiw.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094806b78761---zugisidusaxewisufojo.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/xilizezivewovifefojara.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c564137e5---60994140326.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/7f1bbfc973bfe5fb44e6aa2e6841ca4c/kupusuwepuwoda.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/168860815860f2c86b9ef6e.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a12e067c5b7---xulojokane.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/vifosag.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3f95ce27d---sizibuvalinisegiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=serving+god+in+truth+and+in+spiritPDF link annotation
    • 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_off0000f8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BF 10864 bytes
SHA-256: 9f39fa0fb3af9cc7650d393664b52be1181bc186a5fbc0634e6e646ed411c008
font_01_sfnt_off00011194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11194 16880 bytes
SHA-256: 00c79e68d73e559381d668b69c3649916c8cf95e6b57cc6089de042eb8d1dc8f
font_02_sfnt_off00013d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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