Malicious PDF — malware analysis report

Static analysis result for SHA-256 080ef26a10e0f1eb…

MALICIOUS

PDF

89.6 KB Created: 2021-07-20 18:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ee2d2e938f12058a297ca90f7a667a2a SHA-1: 2f5c870dda0a70ab354b0edde4cb9758d9e25f68 SHA-256: 080ef26a10e0f1eb35fa2b7469f6e99493a55483b098ad293a341a5d4b83f640
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing operations.

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 http://www.tamtrebinhminh.com/public/files/panigobajivitidemilononu.pdf In PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/89079926328.pdfIn PDF document text
    • http://project-st.ru/userfiles/file/devenodefinofopelep.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/rv4piu4vbbr1u1c7ivdicp6b03/97682761181.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/d6qh0l4mirdrmi1dsl4ccu1ud6/50794579937.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df913213c4---51502533662.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/vobokodimapatavapulugo.pdfIn PDF document text
    • http://pensacolahigh1964.com/clients/1/1d/1d652d7f5bd5fd2f3712913460b20393/File/rufenisoderuki.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076fd390ae4b---63011277158.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d08441f206---675339629.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/bbb6d9bccf3dd24eb5433697cb533110/33638613934.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908747eb10b---dexewugizowedigifafaguni.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/18690126708.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1e1e61607---fonitedufegiludu.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/70932933068.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/mewomizexidu.pdfIn PDF document text
    • http://poetryforthespirit.com/clients/872464/File/tumidesamizikezofugetev.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/7604580669.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/d663ce292ec433390a57f4a3d136bdfa/pofemefip.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/cgartghpdtpb1ov7ad1cqh9q6v/rimetinodelogegita.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/25361032219.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/madonesofiduzen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=surface+roughness+n7PDF 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_off0000f658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF658 10604 bytes
SHA-256: bea0ce3e6fe33e0b2d0d932b16d9f4cc7c5a1c6c780ac3c284156ec6e005078f
font_01_sfnt_off00010e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8F 19096 bytes
SHA-256: 829a5ebf4a2dc072a285e1627ededf15663bbd2c77a913cef7acd7f94e86b39f
font_02_sfnt_off00013fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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