Malicious PDF — malware analysis report

Static analysis result for SHA-256 60193829ae086c4f…

MALICIOUS

PDF

78.2 KB Created: 2021-09-03 03:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 39450fa0a883796d6b3b57145cfa27a2 SHA-1: 083ae3eac6d07c7352f8c55c39fbbeee4f570069 SHA-256: 60193829ae086c4f4fa1f908d735b25200415817d5f6776f45351aa1f85daca5
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest a phishing or trojan payload is being distributed through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://nomylo.ru/uplcv?utm_term=kaufmann+filosofia+do+direito+pdf PDF link annotation
    • http://itineraire-consulting.com/ckfinder/userfiles/files/23994637378.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/wiwedevobusinijito.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/bujezanop.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/dc5d8ab4ccb201868b0901357359657c/66504175734.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/79561841531.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/22964351944.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/61220738739.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/noxugunarurugulufog.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ecdcf35121cfacb3d7257c32bb91bd32/xugimalibax.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/96865029529.pdfIn PDF document text
    • http://ligneus.hu/upload/file/kajuwolupiva.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ass7r9g0pslia0hmd1orlbla4k/vibuwomasinumenudubitoza.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/sogaxerutijowelapoxoloweg.pdfIn PDF document text
    • https://12waktu.com/contents/files/tuwapikegekuxevofewimanim.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/xizalanom.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ac9c000ea---kufowanajuzine.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/nirukefager.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/f84ci8gpm96onfcimc0ji3cmas/69956324020.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/54232574843.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/806fd2fc46e78dcdc07397a8f9299ef2/39755940582.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/42246412115.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16109179a1af38---nufitokumatolamotizikapoz.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/9604921355.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1610269f45ef07---57715726872.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_off0000ca38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA38 10748 bytes
SHA-256: ae5b25106286f831f97d6aac0f7b7f158132d7586fa5e9155e7d89a34b7bc819
font_01_sfnt_off0000e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFB 19512 bytes
SHA-256: 8858c2c6c01da3fd2d826a9d17ffc1fcd51796718123213d12315b9b632e806f

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