Malicious PDF — malware analysis report

Static analysis result for SHA-256 da6ec1247d816299…

MALICIOUS

PDF

73.2 KB Created: 2021-08-14 08:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4d400f2386bb512ecc8a79556cf67736 SHA-1: 0bb737c6b76a50a93b67a8bfcee8bc9c02770246 SHA-256: da6ec1247d8162991aaa6da93f552843e326d7b20d0e9b63db079eb88cdd3fa4
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, forming a link farm. These links are designed to redirect users to other PDF files hosted on similar compromised domains, indicating a likely phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160856aa60941f---98763098413.pdf In PDF document text
    • http://lalinpress.com/ckfinder/userfiles/files/43741936862.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb17937b9a---musenomo.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9bfacad2---90452099218.pdfIn PDF document text
    • http://henca.com/files/details/file/gejinurijatuwib.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/41459515396.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb70a782aa---jeriwet.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec9432d706---kopiviwobaliwufadami.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/28288552020.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf88f52fbcf---10141038941.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/kedabarojerojokanapatovu.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e811d428b9---tufawirafuwewowutiza.pdfIn PDF document text
    • http://studiosantomauro.it/userfiles/files/wifimekenetaboludojizipin.pdfIn PDF document text
    • http://point-grey-1970-grads.com/clients/f/fe/fe7686cf254963525dc0bd811951f15e/File/20871699950.pdfIn PDF document text
    • http://fundacionecla.org/resources/original/file/52812096605.pdfIn PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/70032009665.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/96857728464.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607622258ff52---60252670863.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a02bf6d91c3---tobewotomiloxunejakisa.pdfIn PDF document text
    • http://beachhigh65.com/clients/879402/File/84225104236.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/nikati.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=unit+3+atomic+structure+test+review+answersPDF 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_off0000bdaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAA 10776 bytes
SHA-256: 512657d895d8598e7294b22a8bbc87f0dcf1c6d2ce33dc209f2bd4e8e540d36c
font_01_sfnt_off0000d692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD692 15552 bytes
SHA-256: e65b169698845760a4191a9af6b453b6411216acced399a24d310a1fd7c41b9a
font_02_sfnt_off0000fe46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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