Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a6247002a39c54…

MALICIOUS

PDF

98.2 KB Created: 2021-08-14 22:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: f00416e569caa64cc24e57bca9a36807 SHA-1: d2e7801baad2ab0ec4c1a99962397274a156a66a SHA-256: 65a6247002a39c545a45138bbe61269aec38d217834a0175e9c0f05e7899594f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://agencement-menuiserie-var.fr/stockages/files/kujibamiwu.pdf In PDF document text
    • http://efuturesthai.com/uploads/files/nemawojazigopexowuxoba.pdfIn PDF document text
    • https://xn--arbeitskndigungsrecht-best-5zc.de/userfiles/file/48381945400.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/gezisegadexojo.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac77634657---vugilujovorurotovilodiv.pdfIn PDF document text
    • https://anakmeong.com/contents//files/kebexikorujiwidevulubozil.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/3502352432.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160beeb9ad95cc---setesi.pdfIn PDF document text
    • https://alternatifhirdavat.com/upload/ckfinder/files/wiromunavurizufik.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d279b0aa84---96602752648.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc04c74296---dafadilefilefuwatajulol.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/91849736121.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160840d4116879---pobifabat.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/kibedowovetit.pdfIn PDF document text
    • http://goldmustang.com/files/files/81314691348.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/92339176255.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/32891323315.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d76dad60223---menonoz.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d27cd68df1---58676127348.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/wijuwikugegasovuxawidog.pdfIn PDF document text
    • http://dsm-trhs68.com/clients/8/81/818e764d3414495a915a5f66638dc9bf/File/vitidivakupulifuwijel.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/dukofozufuxerutipizoxuvar.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d46c6b934---39457988457.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=citing+textual+evidence+worksheet+8th+gradePDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F9 11336 bytes
SHA-256: 80cb56b9e38f0882fb5e4d1ca4a6c7311caf253c9146b7380b4910280a8372c3
font_01_sfnt_off00011e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E80 16412 bytes
SHA-256: b6bffda2f0d37a15b491898dc2f884875a9ab3a5e5bea78901c4244581c185fa
font_02_sfnt_off0001351d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351D 17276 bytes
SHA-256: d9dc5edeaf2edd484381c206f6230f160751bc78d179f4a9cde300cd3d88989c
font_03_sfnt_off00016260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16260 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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