Malicious PDF — malware analysis report

Static analysis result for SHA-256 032d898d507e2b11…

MALICIOUS

PDF

95.9 KB Created: 2021-08-10 01:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b274bbc1e9a568c4a474c599c037c4b3 SHA-1: 137d8a1cf47b4752c412fc340232af8204e4d20b SHA-256: 032d898d507e2b112e68f2c10761dae8d422bc5d9542d6d83651dd3d6cc2f709
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple compromised domains and link farms points towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41b8bf1230---labibiziwik.pdf In PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/1673231588.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e7b219ec1---2988949029.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/dezora.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/d80f878562920f5791735dae732afb34/sewuvixuvutivo.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/levoturijasetugixu.pdfIn PDF document text
    • http://landpas.pl/upload/file/sobani.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/t3chli0vvmoriavqfjvcguf3a7/weperugujanavumigezame.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbb0d2255e---rasojoboxikej.pdfIn PDF document text
    • http://zxsolar.com/d/files/718009290.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608538411bfd1---20775174430.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c001543a689---52548731659.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a94d75bfb48---kebelirenoriluku.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/li4t0oqpnr071gnfmum0d0vnk5/fizazeteritosoxetefer.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/sibepemukijiboto.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/a37279e3bbb3c71e598b1d6ecb94e7a8/nutatekovunevoxopexa.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/79294873820.pdfIn PDF document text
    • http://18554080.com/userfiles/file/32814821645.pdfIn PDF document text
    • http://southwest66reunion.com/clients/f/f6/f6f8b7bd17d60304c359e527a2c43449/File/toxejezire.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16071e3e2273e4---futixoson.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d22f50e9272---40078015516.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/48474223738.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/74eed055abd6fd170755aa17dbfc2a5f/39422348875.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/dccdc46f31bffe98695672e806b1e250/17407104457.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=gartner%27s+hype+cycle+report+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_off00010e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E32 18704 bytes
SHA-256: ab69ff4f9f341415f533c247d2fe6d85262c1308bcf709e85b888c7a23bdafb7
font_01_sfnt_off00013f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F85 10812 bytes
SHA-256: 87fd9e45dcbc92c538a73dfb4fdd12b41414122e127e260435722fd5b440624a
font_02_sfnt_off00015883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15883 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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