Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e301e04a309087c…

MALICIOUS

PDF

91.1 KB Created: 2021-07-04 23:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ec84fcb6c1ccfa09ecd89fe098342af1 SHA-1: 2ac19494d170a052f15ed47e61a8c6bb7268bda1 SHA-256: 0e301e04a309087c0729d33aa47b8ac4c31be2f4b790fbe1d217d1fd5de30bb7
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the nature of the document as a link farm on potentially disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083ec4221a66---buletazedinuma.pdf In PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/87daf793fd219439b749e8212d687e9d/moxipediwuteb.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/dowipebekamoda.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/riguxuwugelapofekalaxa.pdfIn PDF document text
    • http://mid-europe-ex.com/wekepoxeronumeder.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088eb54db571---vujopuzalewufawenal.pdfIn PDF document text
    • http://hc6999.com/userfiles/files/gesifalerelujijarezosi.pdfIn PDF document text
    • http://kanstm.com/ckupload/files/14778515023.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/opd77d09jg800b1guor0t6udu5/84362571419.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/dubemefexu.pdfIn PDF document text
    • https://parfumzone.ro/files/file/boxidasu.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/4a783500df232560c8ca8b44d7b04566/rugobokos.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bd6debc64---pawinotijuz.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/0b7c16c1d2819d849cf21ea58c50f7f4/64110344794.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/9fb0f0acd4e5c43d0af319c7a0dbf743/jivuvufujul.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072094f39410---51628649871.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/fe69fa77a6b10ef20b65bafaff8869a7/jevezubibaxipafafafofatop.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/mutidokekub.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/96849725016.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53551f0ae3---wonuriseg.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160711e598da23---95520348264.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c460869e395---xakum.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/pajusilijaxire.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/0q40na6tlte4t87uvmtqaoad6d/24430228376.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/32828812651.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/suzebivefakafoboforimo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=the+goddess+in+every+womanPDF 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_off00010102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10102 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11919 10780 bytes
SHA-256: c4abec75fcdd0279f8e2854a232029eb2831ca352d4fb05c3e4bf167f7e598c0
font_02_sfnt_off00013195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13195 16948 bytes
SHA-256: 67b55656271427f73593fd4d62c9bf4e4533ed9a0677a93471dafefa2ef73639