Malicious PDF — malware analysis report

Static analysis result for SHA-256 45074a382c67a4fa…

MALICIOUS

PDF

82.8 KB Created: 2021-06-27 04:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5cd6fe7ebaa3cbbea20a476d0675f787 SHA-1: 82e1d7f3e08132e95f421349c77f0bbe271141d1 SHA-256: 45074a382c67a4fa3c41d8afa0e428f45d82226b96acf67e43d4fdb0934a7e1c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting it is used as a lure for phishing or to distribute further malware. The presence of multiple external URIs and link farms on potentially disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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=from+socrates+to+sartre+lavine+pdf PDF link annotation
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/28b1a323f644f72a98a1b157b82824f7/39826518584.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c14852e71---pavuxufitugalilife.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7830a52385---poxenuxemed.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f4ca40189---zavofoxodinoxewo.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/p4sr28j4nbt5rrgdnrls4tpak0/90610487596.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/77598539410.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210515195643.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/db27d96194a19cc42fd3ba802540b333/gugojoda.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832cfb418d2---pejitelu.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/10127517239.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/3adef839cdbbaf45447fad4718e03eb3/xoburebosazirateribi.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/55852620952.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8707c2a80f---fuwoz.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/78494073813.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/a47d75521967c287040984829f8564da/78248790851.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/55839690105.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/304ef77affeafbbabe614c013a53b2ab/balen.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/i93qtrsvfm1va83183c1b7lvig/31976967643.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/xirupanofu.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/85855240048.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb0828d545---renufevasutofekogilaruv.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/jbm3cr3mbbbj5k55778hlndh82/legekiwo.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_off0000dfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC3 17472 bytes
SHA-256: a5e35578aa8f753c540831c20ed6d73d6717cdcbfe83b62d2f6cfc0ad86182ed
font_01_sfnt_off00010cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EB 10824 bytes
SHA-256: 81a5e46b7845c1e69cfa1b0e2925cf663ffaca195d214d96f400242fa29811e3

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