Malicious PDF — malware analysis report

Static analysis result for SHA-256 60458dda33d43b5f…

MALICIOUS

PDF

78.2 KB Created: 2021-09-04 16:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4ce5d49dc9d58eb888de8b2b2cd46719 SHA-1: 1229f9fa3ead6ce5e652bd79e0f35912b5ada329 SHA-256: 60458dda33d43b5f707f07b498d8eccbee78231924ef61ed0004319dcb459b9e
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. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs lead to various PDF files hosted on potentially compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/abec739de4bb3c4bcdf2748f02dd7c07/jonefe.pdf In PDF document text
    • https://betamachinery.sa/other_files/File/biwonubapixodokev.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d62f8e3173---gunemeneninujaremivipopud.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/lagawewawojipoxolu.pdfIn PDF document text
    • https://vieclambaohiem24h.com/upload/files/98049641253.pdfIn PDF document text
    • http://dimexautomarket.sk/ckfinder/userfiles/files/faveboxigapu.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffa7d22c01---ketutixegowudodebumu.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/sukavobomorovusoru.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/97669914206.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a825133175d---90650267503.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/fujipofu.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a17275bdf3f---3755918119.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/36679531550.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/284b192e2789c4b4af752580c6e002f6/26835771915.pdfIn PDF document text
    • http://songiadahoaian.com/upload/ck/files/xexosebupuruxikejite.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kibuponater.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/35e2ff0ad7935d3df325e0f1c6acdcfd/46529125592.pdfIn PDF document text
    • https://rajatotogroup3.com/contents//files/nofulaxivuraxavesarox.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/ac4e71eb30ecec908c2ef615a391f2c2/88784879412.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/63992343820.pdfIn PDF document text
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/9vf5kg71nbqnrdeq5gefksjaf8/tevedawonunovuvizib.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/16799660410.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/nbuossrhbj51t1g1ilduffo890/migogejarirajajir.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606da492126f7---dabikewogaxapeti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=aggiungere+immagine+pdf+macPDF 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_off0000d0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B5 10612 bytes
SHA-256: 7bd079743f7711bc5fc3e8beaf424d7b0ddbc153f3f10b760c69ea69d5b4d299
font_01_sfnt_off0000e8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B7 16416 bytes
SHA-256: 101189fb4bef557f9c60697d303f447efe82b4f27235ee148261efb5090d4d7b
font_02_sfnt_off00011337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11337 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1