Malicious PDF — malware analysis report

Static analysis result for SHA-256 46236934c3a72175…

MALICIOUS

PDF

90.5 KB Created: 2021-07-26 11:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 64e810f20d15282031293cf1509e5988 SHA-1: 2b62c095086fa93eb59b2cdbb3a1bc4b0c6622b0 SHA-256: 46236934c3a721756dd008162ba1a7f722bc78971e3ec0566a2ff5ac1ebef2db
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves luring users through a document that hosts a link farm, likely to lead to further compromise or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077120f6322e---57068846033.pdf In PDF document text
    • http://ankamet.com/userfiles/file/81147687795.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/ece28671e219573217927960174b82b3/mixuravol.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/dd1febbbb8d784c275f34e99c22745db/wibezofedudekuwe.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210517170822.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/21928954885.pdfIn PDF document text
    • http://daiwavn.com/uploads/image/files/65416413537.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/36967933378.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/httvjjhqvl14dlaerkcsaseel5/midunofe.pdfIn PDF document text
    • https://turbooto.vn/upload/files/10752942739.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/84023659928.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/affc0186f6fd156ef5fb24ba713293c8/16433003333.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/50830962112.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0df27a362---16381099364.pdfIn PDF document text
    • http://accronline.com/userfiles/file/vuxilawopidafalela.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/dogawalaxuxej.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/76450280494.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d641ac0811a---42590226499.pdfIn PDF document text
    • http://maytinhgth.com/userfiles/file/62933709899.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/4veffp37soflhkpdncu6tr86uo/nijezixefigimugivezani.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/t5tu6d9jpg6g0ermdh5ldeh4cn/80613860747.pdfIn PDF document text
    • https://areicon.com/images/file/25482644935.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/pomupubebowogini.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c06b448b997---beselozila.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdf135cabf---21277537663.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=direct+object+pronouns+french+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_off0000fca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA0 10916 bytes
SHA-256: 3e0104d42c79c5ec66746ef6f19f2510bb1873ca0ad2366d16a55f4bffd66659
font_01_sfnt_off000115b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC7 17872 bytes
SHA-256: e36ebb9c477ac52bd1e492aa30b0f858b476dc6e17edf82cdac4d3e10fd97609