Malicious PDF — malware analysis report

Static analysis result for SHA-256 84edd6d30948b592…

MALICIOUS

PDF

88.0 KB Created: 2021-08-03 07:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a537f5253015ece4998f3cb7c0ae3540 SHA-1: 2d85be2013719c1758775d666bc46daeb3cc8b2e SHA-256: 84edd6d30948b592dd581394f826456dbca24a45d9c03797e6bf4c650f3921a1
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm to redirect users to potentially harmful content. The PDF's structure and the presence of multiple external URIs strongly suggest it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927cb347e40---12835509927.pdf In PDF document text
    • http://pphjako.pl/userfiles/file/48518838563.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0cb62d19a---nozezoduwamarafotiwiliwil.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/19c4bf3b291cb49932b07e68da98b5d5/74731568231.pdfIn PDF document text
    • http://tupnate.com/ckfinder/userfiles/files/95686218409.pdfIn PDF document text
    • http://scan3dsaigon.com/upload/files/49274331345.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/76195783037.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/184844344760b0efba848c4.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/zisidetixewos.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/jerajegagufitas.pdfIn PDF document text
    • http://ibb-online.ru/f/file/sogivivorenikivusozu.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e081112e9---sowunutugerefajumosoxevu.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160bae57c1597f---kavolatinifavisowesetab.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/7ec42e8cff6fddebb1064a2985c32874/68908895515.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/62418295364.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b99d092ce---46622156220.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/wovubofose.pdfIn PDF document text
    • http://18554080.com/userfiles/file/mijaxo.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/91370111247.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865cb042bfc---42820552905.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/88363295057.pdfIn PDF document text
    • http://ruilong-ironwork.com/CKEdit/upload/files/58083803009.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/t33jjoq7aur4b6n46vnr34sfte/rofamugexikulutijekit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=what+is+construction+technology+pdfPDF 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_off0000f58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA5 11108 bytes
SHA-256: b1f26e243acc49bb628a1080d4e522038eade4f99639681f97bbfac60e7d8b06
font_02_sfnt_off00012757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12757 16628 bytes
SHA-256: 87d30c293f1581eab8c51568f3746cd5289e06c3d355c98275dfc8555f27ed95

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