Malicious PDF — malware analysis report

Static analysis result for SHA-256 200d5de504ff6f05…

MALICIOUS

PDF

78.5 KB Created: 2021-09-18 10:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 837b75dbbd6138cdc06f250db3ec7720 SHA-1: 4118617b47a6ab56a6d44f97e9b2f0be176368ba SHA-256: 200d5de504ff6f05e9332edb3930415f982fd357df1cde4881c8eec75a772606
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://pixomot.ru/uplcv?utm_term=jeff+horn+fight+update PDF link annotation
    • http://obraz-tlt.ru/userfiles/file/mekufoselajemo.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/ladasamefovukibifo.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/fujusinetad.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/24724430881.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/buvegoreji.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/5adce58ea0acc3a9a49c3c22866c42a4/vudiguli.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/7107648131.pdfIn PDF document text
    • http://beta-rc.com/upload/files/64968740151.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144ffa0ea6b3---zukuf.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/bevizazamunej.pdfIn PDF document text
    • http://tavio.su/files/file/4902609864.pdfIn PDF document text
    • http://yurisolomko.com/userfiles/file/33028107548.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/3a47a7482323856906804650c85ac021/gabuzaxinojivodujetuzogo.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140288b36ada---wunokoditijukiduji.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/pijagudegoxupoxezasixa.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/58733988e46ecf569dafa5d55093705d/55313195042.pdfIn PDF document text
    • http://bige.vn/uploads/userfiles/file/xowevejekufuwiv.pdfIn PDF document text
    • http://unstitchedfootwear.net/files/file/gegafopiwedavedirimoxowa.pdfIn PDF document text
    • http://tuzy.pl/Upload/file/95509250503.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5f1191840---86008010823.pdfIn PDF document text
    • https://mavibusiness.it/file/17846456497.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/50322023625.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_off0000d00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00A 10656 bytes
SHA-256: 3c2a0016d7eeb9f1ff225bad0c8c7b40d36a0666745080cc5232d0496e71338c
font_01_sfnt_off0000e832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE832 17320 bytes
SHA-256: 8ecfb6202b11ea583193d5e8f63ab59f534b11982dee5f6aa6bdea93bb6e26f9
font_02_sfnt_off000114dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1