Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d5940bd9d56f71…

MALICIOUS

PDF

91.8 KB Created: 2021-07-15 23:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8387b1509b0eb6329f442fa43dcbba63 SHA-1: d9a6b688960fe177e4555f06856114195956e4d0 SHA-256: 08d5940bd9d56f71e49caa369f46d62335c2014ae6b157c67337bd3cdd16ecfb
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing and trojan threat. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malware or redirect users to malicious pages. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be part of a multi-stage attack involving password-protected archives.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/e4fac6a224eb2664a540d93494187f02/xanovuxobuxo.pdf In PDF document text
    • https://fizjolech.pl/userfiles/file/31213592369.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/kilam.pdfIn PDF document text
    • http://tessuno.com/upload/files/60ce40570a58e.pdfIn PDF document text
    • http://moristas.com/userfiles/files/tupovalenipibanegejutuni.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160cd952d650fe---24349152574.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/16c8d0e806e0108ef40e604829067522/nudilireretulogesabamaj.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/96894756149.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c668697cf---54279609550.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/0h0a8lc6ajgtf3esi5n6m7hgl4/sodarul.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609407cc01f28---8463653807.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/76110d7f393fa0d27051d1d309a21fc8/31642011028.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cadc12c82e---xopifevujefiziga.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/d9576de7dd9e713f603c5a200d3ceff1/xetimigumanezerewuxijur.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/5rpdrio357jd4t9mlkji9etcd6/3085141665.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/tq3ai9jbslkev5dg9hkufnnse0/33848707310.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/gavumijevonamabewuvu.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4fe79d823---9365312439.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751d5468354---xovisizinenukukeropekap.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/n81li4uc8gsmodjd9at84o91qm/wedasokala.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/jm3mstggf8v2as4ti3gqhi9qv3/wuwobejulo.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e6021d89741---42944350947.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/vavidaxeviguvamesaruwu.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/d1a18e3b820713cd7e64d7e99ec356f5/nazamofen.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/tejuvupe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=best+town+hall+level+3+basePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7D 16084 bytes
SHA-256: d11bfa2b02c462a3f9075532ce7ec1132ca3691ccd6a850e0dcf0119a218c04c
font_01_sfnt_off000102b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B1 17792 bytes
SHA-256: d94e330a53351a0271b27fc9469389fe564c242a144ac958346d27684981f10d
font_02_sfnt_off00013164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13164 10528 bytes
SHA-256: b59b9cad4213e7ab752899aecd284b27fc08122c32e5ad2f62c7f2fa4280f9d1
font_03_sfnt_off00014980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14980 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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