Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f3b6525479e4d2…

MALICIOUS

PDF

92.7 KB Created: 2021-06-29 17:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b54610c19faf007c837b0e03b82e471d SHA-1: d9ee85d9b30eae30c1e0c90620d9fb8f5a8aed51 SHA-256: 67f3b6525479e4d2d738b637aad5239b21667203622120f0527589161456b556
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically related to payment or invoice redirection, as indicated by the 'SE_PAYMENT_REDIRECT_LURE' and 'SE_INVOICE_LURE' heuristics. Multiple embedded URIs point to potentially compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://vimar.ua/userfiles/files/pafilotunijofizib.pdf In PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606decc326e12---83155940291.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/4e83a8fdc3377af25db654fa590fe2f8/jifukulisuzajidovok.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714ba7528fb---kififakokonitiluxuzevesof.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6ee0bfbfb---57756237814.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a91d92c170e---geditesalawelexegobenuk.pdfIn PDF document text
    • http://shadesvalleymounties1969.com/clients/868959/File/51265323109.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/80ee5a4a7e4a1c97230af2887ec9c973/vajej.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97eb9ad710---namaxer.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/lipawolupefefimibadanawi.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/8e04e5f977ccdd8c1f3c53cb410cdc10/33572513202.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a82251c71ff---50186635905.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ae95563adba---68978707483.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/7d5ff6fc23bfc900371caaea8de676b6/33526481546.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/56408817527.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/70828623601.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/43146054851.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/de8ac4d4f4dbd808f5c3e4dbf1f99f6e/2130325795.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/42706824173.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/daxalowiba.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/42337789076.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/i39ahjljsbaktkj5is0c91te3u/lamewexenexapuwe.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2f64651f6---61413976886.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088481746a9b---zerebukaj.pdfPDF link annotation
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b496b3c8ac8---73953852592.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=pan+card+correction+form+in+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10639 10568 bytes
SHA-256: b3cbfe5591d50aa20d5e1884261b6dc612a900067b282be9d75f18a9cdc512a7
font_01_sfnt_off00011e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4B 17196 bytes
SHA-256: eedff848682d4a08e0ce06fbef7170153fec57fd48825a756c7288da902f425f
font_02_sfnt_off00014ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1