Malicious PDF — malware analysis report

Static analysis result for SHA-256 476bc64de263f859…

MALICIOUS

PDF

85.8 KB Created: 2021-07-07 00:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a52f716353dc3db6a685822fca6493f2 SHA-1: 1f1dfcbe7b2631bdc2b08cab5f36757dbd05d221 SHA-256: 476bc64de263f859d103e93cce8a27753b066a8767b60044515f86a54bcca517
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Internal Spearphishing T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is a phishing lure. The heuristics identified it as a link farm impersonating Amazon, directing users to external URLs hosted on compromised WordPress sites. The embedded URLs and the document's structure suggest an attempt to trick users into visiting a credential harvesting page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=pride+prejudice+and+zombies+2.
  • 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://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d51d2338f57---72225162136.pdf In PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/6f1vqhvcs34rl6e0f314hvgi80/xobefugujaromukufijanujaw.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160accf38ad2a3---95131051879.pdfIn PDF document text
    • http://rideco.hu/upload/file/17353153059.pdfIn PDF document text
    • https://room12shio4.com/contents//files/57669461191.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/xogudawunivibikavobulo.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/3230a3b8f77811df3f64732fc640f7fb/83803341515.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4180f960b8---damasuzawuzaweketufulewo.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/i4rgbujl70eh9td9k0ebl3dce4/boririluzanumubafiwu.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a725a71d929---53161452418.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b826d748b65---jiberifudatopabowit.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/6737f71a63f13a259ab99cc38ddd6df6/totokizeb.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/d3e9b38bd6e592167878500f23d56871/zisevakigedofewu.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070896aebf22---mexidafikugi.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec6419b824---famuwumuxijajeluzetuwi.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/31f8b2fd201d8f34e9c409c2f74c801f/20398039015.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/2649601045.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be0d1b6423f---sapexodagidebazodowamu.pdfIn PDF document text
    • https://dineflon.com//files/23728127849.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/71394658913.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/14428585300.pdfIn PDF document text
    • https://angkagenap.com/contents//files/vinerezutenonuji.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/67786355290.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/lugulovojoponufovijera.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=pride+prejudice+and+zombies+2PDF 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_off0000eab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB0 11080 bytes
SHA-256: 30dcdc44aaeafa5d563b67addd8d40b9dfee48df5dda403d69febf9eb618e432
font_01_sfnt_off00010448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10448 17352 bytes
SHA-256: 2e0f7c244efa7345c7a812ed0c60aab1acdf707123e00692cecaeb1604f3fd59
font_02_sfnt_off000131b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1