Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed37697017f62ada…

MALICIOUS

PDF

81.6 KB Created: 2021-09-05 22:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eddb206bbc11cfb0044d1b0916a49bab SHA-1: b8d0583e26b48e9da2856f1d6e868f71c02e42fe SHA-256: ed37697017f62adabc71f7aa7ece16e76ffd813897c46476def3839c262291e7
176 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which are hosted on disposable domains or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The sample's structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://www.boldino-hotel.com/ckfinder/userfiles/files/fokofutalabedoralosutevi.pdf In PDF document text
    • https://palcev.ru/userfiles/file/95101354184.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa64c974b---jabogiv.pdfPDF link annotation
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a0aa93b9510---xojokakupe.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/88266632254.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/06/files/210625231027.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/nalaxodabosefedumekiz.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6d7b8a702---53649675825.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/26842586250.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/73889622347.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/28953409618.pdfIn PDF document text
    • http://bvsaigonbinhduong.vn/uploads/files/1634096499.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/lct614l1q99s4mtp8pjqhutnau/sonugaxamaponixadoj.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/bumodugilevogilowasope.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/gupaviwamivufixas.pdfIn PDF document text
    • https://mannoorpally.com/uploads/file/40184576603.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160960f2a39c51---zejesugejopax.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817bb12c2dd---tofumiwevixufimijinapu.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/nibufosuzunusatawudutu.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/noduxezesidomi.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/40954370731.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/f758ce9302153c0779855a0682200e98/pezovusosixifet.pdfIn PDF document text
    • https://kar360.com/resimler/files/ratewizevin.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/nixar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=2005+toyota+tacoma+manual+shifterPDF 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_off0000dbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF407 16460 bytes
SHA-256: 4337a1049064efcb0904b3898ff390164b3abb94d99115c5e5a6d2b6157d4923
font_02_sfnt_off00011e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E53 11096 bytes
SHA-256: 313b77a9b9d98d449eae9be07d13c0254a1fffe12b739c65529a19bf146d3dba

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