Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5335d8b9a3bff8…

MALICIOUS

PDF

97.0 KB Created: 2021-09-07 11:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ab71dab1855e8e49df2f75485e01d649 SHA-1: 6cc79df0bafa1c7c1a5ea025406dab856e900613 SHA-256: ee5335d8b9a3bff805d7ddf5ad87b785c2e1548f7c0103d2e830923683209f45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm, with multiple URLs pointing to potentially compromised websites. The ML classifier and ClamAV heuristic strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://taybaite.com/userfiles/file/fajinezetojoxavenamew.pdf In PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160856b4758c54---12115866713.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160af96e629d56---funamozotilura.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609691909a271---38930651339.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/1af15620c3c8efc2cdbc72400142f14b/lofesajixomulakirovoxot.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/6bf7f28b2f34e33f0ae71ac5b76b6a9b/lavepo.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4072491099.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210902140700.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/69182185810.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-08-24/50f341fc687f1fe7e729c791530a2526.pdfIn PDF document text
    • http://telektrans.hu/editor_up/43440504005.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/pejidazugeroki.pdfIn PDF document text
    • https://proxus.nl/file/xugezagixokut.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610ff158ca337---37555809598.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/2623623083.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161045aab91abc---55139926567.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/kubodizabiwazoma.pdfIn PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/japelovilugasosunofipet.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/6961177306.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/n94uklqm3e9c6v1926fk56ccl7/92147464833.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/f80b5f403a168e7f0ebd28f33c83c2a2/purogutuduxibowuf.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb85b5a8a8---66925237126.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/gisoropiwutojipo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=download+marvel+comics+in+english+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11387 18684 bytes
SHA-256: 1fc0f11a37eaeadefc4a93d2f5d99ad2c2962ab6054d0b5d904a6d4bb705a96a
font_01_sfnt_off0001448e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1448E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA5 11124 bytes
SHA-256: e482190dc9101e3b2a13e9387ce46cfa4db5174aafbc5dedb27799486c6b63e5

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