Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee432776a908a98…

MALICIOUS

PDF

87.5 KB Created: 2021-09-05 03:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b4799ae47f5f25e374df306b6da262b3 SHA-1: 16bbf02335347dff6a23114e2a51af85d589f63c SHA-256: 4ee432776a908a98836bc158b7fc12f5cff81077dba6e3b3a51f49313e33e86e
164 Risk Score

Malware Insights

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

This PDF sample was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, likely intended to redirect users to download further malicious content. The presence of embedded URLs and the 'SE_INVOICE_LURE' heuristic strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdac92ef23---20654981081.pdf In PDF document text
    • http://aep-tc.com/cache/fck_files/file/23875564125.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/kasegurux.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/golativawofivif.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/25667099126.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c66bade0ae4---nolekivi.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083747e8ab53---61999194106.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/mr81ag5kv0fdmnnnu3n4tv2ga6/laragobuguzavagi.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/511bf66965b8e88055d3285e24c3c6bb/fezabonulide.pdfIn PDF document text
    • https://designclarf.it/file/magumokogegelake.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/46115261122.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/vugukoxesovulerafu.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9d5a574c2---35222079447.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/33540540760.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/rabagugoxejosem.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/xaduzazovonewatewibe.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/piduju.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/686edb2cd713c1d97fd4953d964e31f8/16151660332.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/c3mmrafhhjhekl04ifc05ipo07/87657684558.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/50060af2b516013578937acb84496b62/53390291149.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/55f8b08f5f05bb68bfc2877f210f660b/56710068443.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606e96214d435---wapakefuresagugazizen.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607289e5e305e---87909961129.pdfIn PDF document text
    • http://vpecargo.com/userfiles/file/44116649119.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3571525bba---zaduvalukadixav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=tally+erp+9+book+in+tamil+pdf+downloadPDF 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_off0000eeb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB1 18172 bytes
SHA-256: f7ebe58567c3e7d084a1823cb4ce5c4b5f781a735c6bd38a2de5ca3c72dc877d
font_01_sfnt_off00011e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E06 11056 bytes
SHA-256: fabbcdaa4bb97b663f7250a7a01402d9d7079936dfde327944091e7fa461be58
font_02_sfnt_off0001379d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1379D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1