Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2a2c85725be3b3…

MALICIOUS

PDF

96.9 KB Created: 2021-07-23 07:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 638b185ae07080d2a88e748d6c5a8c2f SHA-1: 54f53464d4453004075f610719e270ac47a6b56a SHA-256: be2a2c85725be3b3e6e3fc55b0a17797bc9875078a1fcae891376a69e6c52b56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/34e432012e749b8d8c73f5cfc28e4568/91469558619.pdf In PDF document text
    • https://dentalrud.com/userfiles/file/rovusomazenokuzo.pdfIn PDF document text
    • http://lhsclassof1971.com/clients/74120/File/kexidubufujul.pdfIn PDF document text
    • https://soechi.net/userfiles/file/81828544208.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/846334659.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/filinabewarebuwuluderogiw.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160aa343fa5076---silegegabaleme.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/470594cc35b9382c314459e0ab84d5a4/majafosimunojupap.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160764c8eca943---30056449361.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/abfbed67a2ef0c4743b690dbe1746430/pugugomakar.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bb5b00205---4587686077.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85da8336f0---fasadeto.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/kevedikafofuwikonen.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/bb58d0ef7c42abb96c08f58ccbb15aec/44992461823.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/uci2c4p2nn094k1s2pld7rpbg0/51556213347.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/11917888379.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/57089038058.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8a93c123d---90146628985.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210619_1BF309BB974B283E.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021071406230173499.pdfIn PDF document text
    • http://debten.net/UserFiles/File/73933998334.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abeaf572d67---pigexebapomi.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe66ac6ac7---zitanojoleluv.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c7799d2b870---74993193490.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/pugomikatado.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/70979079615.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=principles+of+extractive+metallurgy+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_off00010baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000123c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C6 11432 bytes
SHA-256: 2bff23713fc847557e40cf7d23ccfd1269b3b6a011543d44a54d7d5f2141dd13
font_02_sfnt_off00013e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9C 21992 bytes
SHA-256: 8c98a90979b61c217c51e6bc18ae03f61d11a30ebbe4e2ae75401f56cc536364

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