Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a64ab2fb5e080d…

MALICIOUS

PDF

87.8 KB Created: 2021-09-05 23:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 051d692a2aeec3b6320039ea928c2fb6 SHA-1: 4192a08ee5d7cc21dd7cb004938a874d4fd33755 SHA-256: 54a64ab2fb5e080d77494742cde8a7f3190173a4dd445898c28dc3aef7c6691a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://smidgel.ru/uplcv?utm_term=iso+22000+pdf+gratuit PDF link annotation
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/7h17eu9hcifhu76v1hcmjoavmm/20216622240.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9542b85ba---livorozozebub.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/34220430160.pdfIn PDF document text
    • https://moscreen.in/cmsfiles/file/zimubugokukefedi.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854f0923507---87060774923.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210522062212150.pdfIn PDF document text
    • http://italiancousins.net/clients/5/54/54f3d33123424807706abe9154268524/File/bozaxomuraxad.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/84463854754.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/99338516320.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/26132833311.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jedarujafubupa.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/5aiaac6h4fi63qmsn2pa4hq546/pomosadetur.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/418b73214bd4b78f50684ac64be0c0fa/dokoligeki.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085448b7f042---64120016368.pdfIn PDF document text
    • http://asvpp.fr/pdf/92595467826.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/42d6239697a69644476ab558ed16bea6/84600023485.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/e68c511ff32c19ab458006a667058ae1/19958191667.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/tukavu.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e94be783384---71711938314.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0464bd38ff---57010662278.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae305246a0---fikeleximuzewo.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/35752980838.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/dufanososev.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6d378a76a---niropozetumebat.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/ditikatobopudutugekukewun.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_off0000eafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10310 21104 bytes
SHA-256: 92db1e79f2522a25823884909b798e395fc72b7b422714bc1909f3683d4a75cf
font_02_sfnt_off00013998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13998 10684 bytes
SHA-256: 5521f22974c7ff2f5435ad247da4f63c72b9c19c200d5d4bef5389f6ed357830

Open this report in the interactive analyzer, or submit your own file for analysis.