Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6606005671ee0d…

MALICIOUS

PDF

92.9 KB Created: 2021-07-22 22:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 15d1510c0eb3ac13caf1ae9688e02343 SHA-1: 6add47e5413c6027fa40e41caa9e6c8a7dfee66d SHA-256: 6d6606005671ee0dc4ed10304918bac32cc3d4a70104a706e41c4d83b22d0e87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://arohitourandtravels.com/userfiles/file/zowawikoveximiwase.pdf In PDF document text
    • https://amatnieks.com/pictures/image/kexulomebejatixolu.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/f6cb9d422dccf7f36c992f58d67b541f/pavedovasuzimokipizokek.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/40ecc13d740b6b99b5e3dc4b25bf6b0c/39995481783.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/25060261710.pdfIn PDF document text
    • https://xn--b8qxb801j.tw/upload/files/tabovibujivubemaligobazu.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/757c3afa3aa1f61cef4a9b18ed4b5747/duladesutabosetodepevoduj.pdfIn PDF document text
    • http://kalikraft.com/images/file/95779252810.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/rnkbot76g8n7ebdiean48l7na4/67962713483.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/xebasefufukenamaxi.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/zelusujodi.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607204cc6a341---janixajatoxuw.pdfIn PDF document text
    • https://aaaxxion.info/images/file/23570627303.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/9809273601.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/pawejamudebem.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/62knlr0ped64qlae8nc3jl18u3/10482672650.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/5517d5fcb61ca308b9b5b7683ca153da/linivomeguzotuxuk.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a813ccc90e4---wexomutepugepimul.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/d9bad6ee2224d92f9639f0fed7b4f858/kuxuviderigitizaripif.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/aed3240a68aed63056e035d0649b9e1c/jijipexaderudokom.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/5il2m0v89jr0bh9rhppoqpts8p/6484401190.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/72576562344.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/dlskjuqadkuktpkl832pbu8o57/34042893669.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=why+are+some+hard+boiled+eggs+hard+to+peelPDF 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_off000105bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BB 17664 bytes
SHA-256: 731635679090dc85b31a092fac9ecd565e331fce1476a00834107525ce03fba7
font_01_sfnt_off000133ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EF 10984 bytes
SHA-256: b445d52fea56a0f7d6b5e57712ee466a61f76a70c10c2bf9443cde6c7acad942
font_02_sfnt_off00014d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1