Malicious PDF — malware analysis report

Static analysis result for SHA-256 d811cfa8c74b5dac…

MALICIOUS

PDF

73.5 KB Created: 2021-09-01 22:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e46297fb0b8254b4a6ace1cf330c9312 SHA-1: d19a14fc6770e822b90ce125ee3c5cb228c2cca8 SHA-256: d811cfa8c74b5dac2d94de9a77ae53048d55af4f800623bafe884f7b899940a1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to exploit users via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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 http://allg-gyn.ch/userfiles/file/gukasugi.pdf In PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16073e61d65410---37808776149.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/84332610916.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/8hp4f211drvajvjvkff1jgh677/wavofarigetemetetugak.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/jimusudopizewutabixibigaf.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed9aa5c6ecf---rometitazerimubuj.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38f2700b40---pabuvexadapaju.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/99693629168.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160833328a261b---75359438474.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6337300fc---48474516149.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/nolarotuxagowitam.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/e62c09c11a0ab8e0906874da056db1a1/96318458696.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/27212969333.pdfPDF link annotation
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/0fb39eb6d7c41c717372689784cb2190/miwiwimak.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/10511249916.pdfIn PDF document text
    • http://proximeo.com/ckfinder/userfiles/files/zubaru.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/6020862539.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/nanagoxane.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/gd9q0gcau4vl7cmtskprsl3tv5/gugibufidesijidabe.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/6eff7b22d3f741835574514134069f0e/fowejenubanetobatob.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c8553bd2bb9---lagiroxigazufenegugefo.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/dvh42b39jv6t2vml2aq165k291/kuvutalexejof.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071de10e33ae---23328941482.pdfIn PDF document text
    • https://rajatotogroup2.com/contents//files/xazobusuturorewo.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdec49e6b12---74887364960.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/19596840930.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=caramelized+carrots+recipePDF 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_off0000bebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEBE 10664 bytes
SHA-256: f09f3c700519f404e32b8a8e8b8e6c75ebf0171af4b23968537a7a0e5c4bf7a5
font_01_sfnt_off0000d738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD738 16072 bytes
SHA-256: d8be5a4b76420a21563fd2d46b785426d8109ba1aad15ff95c8ca25bd07a7beb
font_02_sfnt_off00010015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10015 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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