Malicious PDF — malware analysis report

Static analysis result for SHA-256 258c93688815bd85…

MALICIOUS

PDF

83.1 KB Created: 2021-08-25 18:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 633bf003773acc64d655857b260742b6 SHA-1: c01487eff0c7ff25ba2a5d0364362954cb95014f SHA-256: 258c93688815bd85317def82615d5d9711e037086c618be3425564338b6fac9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of multiple external URIs indicate a phishing or link-farming scheme. ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://archism.ru/uplcv?utm_term=quran+for+pc PDF link annotation
    • https://cafesca.com/ckfinder/userfiles/files/32482916104.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f7fc6494ceb---deseke.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/20217181143571306.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/66218038071.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/49516849805.pdfIn PDF document text
    • http://orlickachata.cz/files/files/nutamapususitazimazatof.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc2806393e---97012789440.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/silikekitumowexitasekidu.pdfIn PDF document text
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/86745442966.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d66792315f---vodozapirevezut.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/se2dj3hrupuqv5g1cf3rte3l15/5828271244.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/monomotanaxikolobuji.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb93b2083f---wipov.pdfIn PDF document text
    • http://weymouthhighschoolclassof62.com/clients/5/50/50fe23896e84432c97ff20d680692bb9/File/segujojobalorilu.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/90945088474.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/nnufa73c1vinie54ds1ceg8esv/35909386028.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079a81912fa3---wamado.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fef9b68be4---nonivukifarejovi.pdfIn PDF document text
    • http://petrduchek.com/files/sigifagonew.pdfIn PDF document text
    • http://hglobaltourb2c.com/FileData/ckfinder/files/20210825_F32ABDD849880077.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/18284572899.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/22/file/20210522_220925_109.pdfIn PDF document text
    • http://terrietanaka.com/library/files/71443213026.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///ripeperologenagudes.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B0 10096 bytes
SHA-256: 57a3d7d26b322ee446b830513fdfa8981932fafd89acf4f3b324329e62c22af8
font_01_sfnt_off0000fa56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11268 17020 bytes
SHA-256: f6668037955149534f6293e1ac68ae613c97fe3260d7c5b15739a68985e50220

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