Malicious PDF — malware analysis report

Static analysis result for SHA-256 406e76ef2ee6eb7d…

MALICIOUS

PDF

104.0 KB Created: 2021-07-03 12:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 60ec42c9e5d9165c360375e9e20828a8 SHA-1: de97a696e7cb123ca93c2a9f0addce7f1b0b6d25 SHA-256: 406e76ef2ee6eb7dd9630ad18ebac5ddb337cb95daf30f6bef5df378ec765104
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The document contains a link farm pointing to numerous compromised websites, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

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://archism.ru/uplcv?utm_term=naughty+words+that+start+with+t PDF link annotation
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea59bc4769---64996869331.pdfIn PDF document text
    • http://garderoba.sk/images/_file/28185230932.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/0f5605bb563d81feeb432071ffdda4ac/nivajom.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/6c22973ac6440fc4366c9c5db2eaa86c/nifezikosol.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1h9bhhbakl4va5ar6u5r3pv5m3/fijegetarulatiborazelanug.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/rebomuwinamis.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609bbfb978731---xosiwatodosidepojizuzi.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa784b167f---wegibuxevonoxofegubulot.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f29c9c881---gukimakutut.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/vv80ciqmldpkslm8di3umdm847/13456099046.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/dulosuxexe.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/duvigotarazobukavekijulow.pdfIn PDF document text
    • https://ekransamara.ru/files/warefipusidoxal.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/ca0985cd2bc196024c41814cf1c4f049/25089724158.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/72044308335.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b048a93109---45661381010.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/26216815487.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080aea2ece44---wejulisafe.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/0ad27aba19c78d3667ba6b13223b50ea/zopapoludukedawapaxon.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/59408187699.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/ac823d8e2eb485f5c62d5e57ec48ef60/4233604292.pdfIn PDF document text
    • http://novafish.it/userfiles/files/wugonimokeraxodavapur.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/3dcf1502e47df717c24eda1a4081135d/66568462339.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/76979764850.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/januzewogepokenoboboj.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aff94beaa0---58796334385.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a36ae4ac61---12996979936.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
stream_003_off000160c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x160C2 10520 bytes
SHA-256: 75211a7d2c7963a723a0e4f4f08b806ddfe78cc773d65b5f8f1d1614d23cb521
font_00_sfnt_off00012f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F27 19520 bytes
SHA-256: a013f3a88298b0c3f1fce940de32113cd048d4d5d09f7d8cb1b1414061056e45
font_02_sfnt_off000178b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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