Malicious PDF — malware analysis report

Static analysis result for SHA-256 a125a9f3ab31791d…

MALICIOUS

PDF

94.8 KB Created: 2021-07-27 01:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cb8f6a7c785ac5f94b100a12799da336 SHA-1: 6cd00516151dd289ed615fc5f568b589a6c14bb3 SHA-256: a125a9f3ab31791d91a9b526041b2a4299bfe114b0af48bd916f2a81bb963984
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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 http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a703ba953ce---joluresunozepitunuwov.pdf In PDF document text
    • https://mollis.rs//files/94822076183.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/44448418782.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/e3h1mtff8eakmogeeq376av520/33370086351.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/deluv.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/mf5nhn6ctspv79sqedp4id7a13/suwagemegof.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab802bf9eb---4053079862.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/42861366037.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/ku7fj9241mgsnrfic4meppuc7e/53104722237.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/fc27a673f37790e55b291fd5d5e30aba/zajonapaxaxiwovupojopozo.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/da9b3666eb6902b5fa14043964deb581/26832440858.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/79305405480.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa9190824b---64157970086.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/9518560258.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/6joudhdi25edrbun5b9vk1mbko/88888363112.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/hvee1kr6iu3cb1nne65suj2au1/26822776968.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/44672582532.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfca4f02c15---lamamuzo.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6f470e3be---tijopusedogejoxa.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/jiwikejepalarivejususisi.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/larukufadukubapa.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160da91e4a9f59---77989414914.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/87738313321.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=vikings+season+6+part+2+episode+1+castPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 11044 bytes
SHA-256: 5c8a983d4260dd9a2629cf4c9a198e0c3e10267846b7c695a3541cd2786a58ab
font_01_sfnt_off00010e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E33 19548 bytes
SHA-256: 2342e655acdf81694e4bd433bccb81a8c0e57902dd7fa9acc18370dc2cd2b11d
font_02_sfnt_off00013ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EC3 16244 bytes
SHA-256: 7a37b07300b32578f7ede96d47c75fa9192719f5b1a4927122f47b15168b6d62
font_03_sfnt_off000154bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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