Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6dea4440fd8279…

MALICIOUS

PDF

97.8 KB Created: 2021-09-07 20:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 07f3ccbff4b60619125ea7746b0687b6 SHA-1: fc563dd2cfa8723e7e2cc84a5088061b0fb187d3 SHA-256: 6e6dea4440fd8279c8bcaa93a2feef8643e32764bf99bf5295aceff99e999542
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites. The presence of these links suggests an attempt to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=bosch+dishwasher+manual+check+water+light PDF link annotation
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/cnbi8ko9638dvaj6cff41t5l30/97861671288.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/92896847765.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/87274629607.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51c2497648---siroxurukago.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/lirewumojizipedegatu.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/8929767393.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/80074142034.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b47133aa8af---10201403142.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7afd5de17a---2950554900.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8cb8bf8e6---zibexibeg.pdfIn PDF document text
    • http://giayviettri.com/img-ftec/files/varefetabiwodakumeg.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/lezijavuguludawores.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d6cb0982e---50704103932.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/edff13b43b013c88726b5e5a11591f8b/jujubelumo.pdfIn PDF document text
    • http://avon-bratislava.com/files/files/53555703335.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/c7d440c8a6b9d4325beb4c67127ee032/bofibilajo.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/52121537167.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/8950ccb75d4114826cf4ba929d1c311e/baxamuwojujutut.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/30428412045.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b877df77cc6---7565327564.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/c8e8acb4e1e494893cf4b1181db44531/sozen.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/bazefuroxenefuno.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/tiluguretijoxasefa.pdfIn PDF document text
    • https://arendic.cl/files/74116225276.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_off000116b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B0 11148 bytes
SHA-256: 5e1a49fd37fbeb014dd345d67086d478c8d49b07e36b23528479b6c6955d1a32
font_01_sfnt_off00013076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13076 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14888 18464 bytes
SHA-256: a7db9499de824192679eff0affaca9580aa1cfae2aa9fc434bc38fcab507aa20