Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc6e485d5a93d85…

MALICIOUS

PDF

86.2 KB Created: 2021-07-01 23:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4b40575345917243f641716af907c3a1 SHA-1: 799fd6cdba80b4dff7dc16eb8875e8e9448a9c33 SHA-256: 7fc6e485d5a93d85f1aa7fc1a931534dcd6c6c28ba0cc52f39fea2e7b54d9c34
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites. These links are likely intended to lure users to malicious websites for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f487085c51---73923017720.pdf In PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/74e720a42c3dd867bebf4b5407c92ffa/toxosedawawomu.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/defonizumamo.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607576874bf8e---39763532918.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210512185046.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078bf9687b58---16297931604.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/1ef4444c22229dde25da1047af95c75e/49362965998.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/57422361136.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/57730568551.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/1bf68b0cc26038defcba4e4a5b427945/gebopevugutajoxef.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/45bae414c829e5d6202ebcff782f32e0/manuderenopopele.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c75a714c8b---zisazobu.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/vijenujul.pdfIn PDF document text
    • http://diacritic.org/travel/app/webroot/img/files/logonebozagaritukubadapom.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/21420370407.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecff60954f---tewozerawovifowuzaxatujer.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/spqk98hmcp7m114vqqo42l2im4/gipefa.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/046709ef9f3f6576c4008686edf5d478/fukisetanudowa.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/7a5fb7adebc5a8b7095f162f404851ae/5247803428.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/26224919806.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/96021791997.pdfIn PDF document text
    • http://euro-ex.com/images/blog//file/48549783026.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbbc921987---91389638216.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=the+5th+wave+authorPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf2329edb0---fawumanirazo.pdfIn PDF document text
    • 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_off0000ec8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A1 10144 bytes
SHA-256: 1746b8b2351c5f9c5437cfea40e962684a49570aa1c9a72014e73c682ae49641
font_02_sfnt_off00011b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8E 18584 bytes
SHA-256: d8f8e2ea373a8c2ae485f8a1d927e37e30a260f5e18e0aebc0539bbc0a836b24