Malicious PDF — malware analysis report

Static analysis result for SHA-256 2035fe93056a1a72…

MALICIOUS

PDF

80.4 KB Created: 2021-09-01 18:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 045cce9b5834de9ab99a7e5d68e964d6 SHA-1: 2f2021b762dc79e8cd3ff5c8155ca4e433db222b SHA-256: 2035fe93056a1a72826e5804d1a9e91388c7183b6347d22a735fdbd03debd6f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that form a link farm, directing users to potentially malicious sites. Heuristics indicate these links are used for SEO manipulation and point to compromised CMS uploads, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://philabc.ru/uplcv?utm_term=pdf+scanner+to+word PDF link annotation
    • http://ipceurope.com/assets/file/jigazizupaxegodifo.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/kanonujifidomemujinem.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/72511648489.pdfIn PDF document text
    • https://ibexquimica.com.br/ckfinder/userfiles/files/bawad.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1611a5dc50355b---31412041139.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/watijabenefudagoj.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/9cab85d192da7f2402baffc031ddfa32/niripanipejefadelowujon.pdfIn PDF document text
    • https://tangentemag.com/img/file/50284124364.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/983c8ed7600c7c92d10a4ff9fd3283d9/51918395130.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/5bf967291c9f081aa461da008b0910e7/78159969851.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612853be63e92---terojoguriban.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839cbc0ef55---sikuvenumolup.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/86632698370.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/eb2de982bfe571170147f9d68fc354b9/zebamomufonasifowo.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/5777732234.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/ickq5g68mmh9vm43919ll4spqj/2182123031.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/1fc41fb9bf91bc44b1d0414653e62c21/25271565495.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/83080738492.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d28e38d3e6d---roresijuruzore.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33eef2c37a---zafewarunikukebifa.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/katilifibidunalefavizel.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/fumatugi.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/vipabetufamumef.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/48rb52prrp22i9f9vaihigk800/gokamemewozoxazutefom.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_off0000d758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD758 10420 bytes
SHA-256: 3ea3226711251ff007270bb7507a0d57c9a2ec387e5cbadf34c7f179159da296
font_01_sfnt_off0000ef36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10748 17496 bytes
SHA-256: 270e2f6a6ec6f34a070da7ba483fba774ba81ff691ef367fe2c52b808a0771e3

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