Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe2a6a95589bb4c…

MALICIOUS

PDF

91.0 KB Created: 2021-07-05 09:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 7f5bb9b5bbbf60f13c79cd4fa75d33ca SHA-1: eb76e881cb2e63753a15346e8dbfdbbe30dfb406 SHA-256: cfe2a6a95589bb4c9501729bdcc0713cd24606b6be01687ec4dcd78464c6e688
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating a tactic to leverage SEO and compromised infrastructure for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://laborke.ru/uplcv?utm_term=what+is+the+purpose+of+the+gdpr PDF link annotation
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ad17d7d4b---betagorubokevibasu.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b116c695415---desejukinosi.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/rovabumedepomusisob.pdfIn PDF document text
    • http://net-marketing.hu/images/files/91351709710.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9580a6524---begijukizire.pdfIn PDF document text
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/80008251335.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5142e1717---2570585071.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/tikixafab.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f27b4324a---vikuvajuxakevufirinexibi.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1608c058898066---25920198281.pdfIn PDF document text
    • https://ksuskalology.com/images/file/nafunalafa.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/35202109503.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/bozixubedonu.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/11788601585.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/ff7a003a54740b4cf950b5ee54b945a6/71252658041.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/pqjihsinijpgp3bhpmht5fl750/32722652613.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792583b32f5---13994300471.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b16f0b31bc---49084558683.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9323dbc29---55899867934.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be094c6a42f---kaxarusebegefararor.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/52302565802.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/bewowiri.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_off00010082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10082 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11899 10720 bytes
SHA-256: 9189a1cc9f01ec9734b50032d428ad4a2bea8e4ed64d4d952a08afe25ce6fa53
font_02_sfnt_off0001312d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312D 16948 bytes
SHA-256: f2dee881bf596e5292327678ae37ab6ec1ecc3d0a307526a5e557517481cdc79

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