Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd93f2ee1183f20…

MALICIOUS

PDF

82.1 KB Created: 2021-09-08 10:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 7a57f3343719ee66151d79e85743a1b3 SHA-1: 4fdc48c893d070beaa298cc3ada6b3986d2731a6 SHA-256: fbd93f2ee1183f20e6e0cdce86d635a1a7b157eb94552d35c53fd75870c1163e
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 upload directories, suggesting it's designed to lead users to malicious content or further stages of an attack. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129637841177---xuwadurixezulege.pdf In PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/qiiqc3knf50f1vm5v0i0dan3v7/50508969394.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/90224623294.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88e44e9f31---64263524210.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/dunewefuludusidejit.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/xijetalanedipedigexa.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/30130534557.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843d79a84b3---sagilopusetixemu.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/vuroxegoborotonivoji.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/34041577603.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33c759e03f---benezuli.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/55432454722.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/27459087385.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/21889560939.pdfIn PDF document text
    • http://kleiberit.ru/files/file/91800136742.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/ac587b09f01840b09eb3682e9a41b3a6/64820610219.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e1701f6b759---jupomed.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/8f4aa4f77ffa6a25834d614ecaedba5a/tidalula.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/778d0ef66309a37abe25ffcd3cf2d295/90175143406.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088f85fcd255---49643055801.pdfIn PDF document text
    • http://ipllaser.in/uploads/5098185124.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d43cd1014---51046769352.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/52861365495.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/92723394151.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd6035b262---49345849752.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=eureka+2018+proyectos+pdfPDF 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_off0000d66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66F 19084 bytes
SHA-256: 2dd2a33f42071492668fbac72d9ac29ff4691cd13fed87f8d625d0bbb7cdaf07
font_01_sfnt_off0001081c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081C 11164 bytes
SHA-256: db80f247c53359ac342878069043710f4824883e327bf34e03173a79fd615219
font_02_sfnt_off00012286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12286 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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