Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5699bd7b1f2990d…

MALICIOUS

PDF

69.8 KB Created: 2021-09-04 10:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 027f0f1e8e18d026d27e33ce7a4ebf26 SHA-1: be2d4daacbd6173013539bbcf7f85f6c0d317427 SHA-256: d5699bd7b1f2990d6bbc6916536c16ea58d45514e03af4539685e378e72a01a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as a link farm and a potential phishing or trojan delivery mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent. The numerous links to compromised CMS uploads and disposable hosting suggest an attempt to distribute further malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/27ibci4gcppofdfh9t41pujnvo/52934732022.pdf In PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/82d28918b2eaea0ffdd7d86dbd641444/kagemibitagunururego.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083966b6735f---powigakit.pdfIn PDF document text
    • https://alutat.com/data/file/38023463909.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/qoo01ujim843pa8mt3pnh8c8c6/92044105972.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021072416360876693.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/rd0nnf8i606ub98dq7r8cr25ts/nulewukizivotevi.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ca986d7b9---vanenarav.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/62597526201.pdfIn PDF document text
    • http://vet-spb.com/userfiles/file/1804607063.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/4387fbbecf79859c9ec5d2d439b5d56a/falizivukezijonunubemi.pdfIn PDF document text
    • http://bosch-service-center.ru/uploads/files/zufuzipamaxiwet.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b85ec0959---jikol.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/batalodovoko.pdfIn PDF document text
    • https://hkfew.org.hk/ckfinder/userfiles/files/76608606335.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/61411f4eab917b3f8fe0b0b83cb22c79/49898841222.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bba98f6cb95---tagijugimaxavufa.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/pimituseronasilotanonuvir.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/pezorufogilejoruz.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73ad866bf7---dekiwukojakagelabekonujo.pdfIn PDF document text
    • http://synphabase.ch/upload/file/92914646298.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=identifying+word+classes+in+sentences+worksheetPDF 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_off0000b083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB083 15804 bytes
SHA-256: dd1d3406d9f13233167b9d0e537abec76b20d399fa488b5fb99375e58e904bcf
font_01_sfnt_off0000d81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81D 11000 bytes
SHA-256: bb48b7bf56f841804a78749c253630a6715f1d255d2362c23c23398f9b4ade74
font_02_sfnt_off0000f17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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