Malicious PDF — malware analysis report

Static analysis result for SHA-256 d770e86d61ff57c0…

MALICIOUS

PDF

96.0 KB Created: 2021-07-01 11:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c7239d6a0121ec3014b026105ed1c3e9 SHA-1: 449a00847aa680c07dbec46a62b992eb38948471 SHA-256: d770e86d61ff57c0b8beb0cfddf8ef60d81c639629fd917ef487730e41c49a7e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to other PDF files hosted on compromised websites, suggesting a link farm designed to lure users to malicious content. The presence of a raw IP address in one of the URIs and the ClamAV detection as 'Pdf.Phishing.Trojan' further support a malicious intent. The document body was unreadable, but the heuristics and URLs strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9768

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/ecee043db15782e402dd3cb779ea0133/wixagusevupimevetix.pdf In PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f61a6ad39---jazito.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/6fc089651e4dec841eaa88487531db69/87006463925.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/76731746742.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/vizerodujonebakonunu.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/565d36aca2e7bf9b5fe9de99764c1a8d/79210775213.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/goponemunewemif.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/10068431837.pdfIn PDF document text
    • https://pasarantogeldua.com/contents//files/tofagunimuxulag.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/a34a599d7d1bf32369d237b5f5b1ee28/gumenomidevope.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/bokisedotil.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/fced115934c847e66d0b07c18c3fe821/lixugogudusalaruni.pdfIn PDF document text
    • http://kimkhimientrung.com/uploads/image/files/tozalivu.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/57570622428.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/f44b60babe88de41cc8769bf1c6cc4a9/bekurewe.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/jasofebexigemedulu.pdfPDF link annotation
    • http://gursakaryahukuk.com/images/file/21120522539.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/naloxubukibutape.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/4366715c12cfe60c220edc0e0e2ead8d/46129990118.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/fawosowajetivarufa.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc32b85232---malamivenen.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/xuwakemexi.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/1ddb7e7dc19c317dc22d71d29ef9ef83/govalafifojudiga.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16099c8c7e8ff5---16763103796.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607da2d60f0ee---82488738536.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072da54e7892---66321783790.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+change+text+colour+on+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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001145b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145B 16076 bytes
SHA-256: 0491ab1f9781984131449868ed95f15036bddabad70a51597ae233fa8bdf08d0
font_02_sfnt_off0001297e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297E 18276 bytes
SHA-256: f9e6f8d58192e31397e3c5ea49eb703631d1da429488c5777a0a318203f74438
font_03_sfnt_off000158e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158E4 10916 bytes
SHA-256: 1d0e75d0b3f6cd060e2cb94b65e9c0013043f66ec7976e5c082cefd1994e7259

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