Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca31a7ee110a15e…

MALICIOUS

PDF

75.2 KB Created: 2021-08-14 17:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4c316b1eebc1630f513276bbbd275808 SHA-1: 639691a36e14d06147aee24717ad8de930fa3af6 SHA-256: cca31a7ee110a15ee7ad9eab565d73795abf8a8c1e1c7e601e23a3b17ec5f9d8
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. ClamAV and ML classifiers strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of external URIs and link farms suggests an attempt to lead the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885ec947e97---dopobasugulipe.pdf In PDF document text
    • https://cissud.eu/uploads/ck_editor/files/93233266762.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/jitijej.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/gumolupuwasixowasonerav.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/gerogovowexekavaf.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1e3ce7dd8---15736344254.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/99972660057.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/vezuloso.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/momalaloguvemuvilokalur.pdfIn PDF document text
    • http://agro-norwa.pl/userfiles/file/64834632699.pdfIn PDF document text
    • http://emeraldoutback.com/clients/f/f6/f61299a274fa8fdb0c00f5b1ed511d42/File/2241702767.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/futuvubogugirine.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98fcbc31dc---39172818797.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/25666904151.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/parekiliwojatinadokesi.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/83c2448e4aa3a93f89bc24212b1f754b/gexumuwuwipibuseludufo.pdfIn PDF document text
    • http://popmetre.com/news/files/49180933852.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/5669107873.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e7bc6021920---febenimidunufiwekuxenili.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/8fc202e93f7e14d84070886529f42997/geduj.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/89035168326.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16079874dcf0ce---telunikekagewisifedoli.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/51438869948.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=clinical+laboratory+science+review+a+bottom+line+approach+6th+editionPDF 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_off0000c0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BF 11384 bytes
SHA-256: de2fe260cb561059a700ed930b4d643ca8874cadb613180ca037275b14cce11a
font_01_sfnt_off0000db4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35E 16168 bytes
SHA-256: 2335f92b618b329ed9f9a52ec2822f57637addfb8283fd94a9f0b9f70c9fc5dc

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