Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e02f4d729a89301…

MALICIOUS

PDF

85.8 KB Created: 2021-09-03 08:28:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cca0346f43391d8b6a587ab64a57f5ba SHA-1: b3cda7c8d3e1a3a740117d0fb2b0a75224665012 SHA-256: 6e02f4d729a89301021ca62fcde38277b462e862821fd476fd64809edb43e44d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://queure.ru/uplcv?utm_term=language+proficiency+test+with+answers+pdf PDF link annotation
    • http://kardelendalgicpompa.com/uploadfiles/file/15256664335.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///rebuvelul.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/6f9081469dec73acdce2f10b565db2a4/69439953261.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/mojutibovewodemexo.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/wowotadalopupibirutugir.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/84960431883.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/olih5kvqvjslm76qf7hvn4940n/75587623269.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/zekeri.pdfIn PDF document text
    • https://papiratisk.cz/soubory/judikepamepuf.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160946a82cbc00---zifotutukasemazidofatofa.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/9d32m5bjoot7p38neja8et620h/69215248209.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/d49b0d3da868d3402aa18df9d9ae6bd3/mupujopi.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/didesokuje.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/murigizosipubilegupik.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef828eac78---39249044034.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/86691948091.pdfIn PDF document text
    • http://mp-journal.com/media/file/11851705240.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612521bf56dd7---wafugomenevifu.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/20911785598.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/161234364dfb0f---64313149819.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/e32eee0994e8fafddb88af48dd7cffda/jirakegodipa.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/s37120en16m63fato8rhiu1fov/dumejevematub.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/b86fd70c27060d06c90c3742fe82097e/49918818381.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/8964111ffd92aabe7cebbb3dd7126820/tivoxedev.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/84473600799.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/kozolotijumoxim.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/c49bc05b7aa6aa227a8e7c7ccaea4635/moxojinite.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_off0000e4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E4 11112 bytes
SHA-256: ca4cd70adda48355f8fafc963ac118bfc6e0533be1d44869d96942130712db19
font_01_sfnt_off0000fe9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9F 19264 bytes
SHA-256: f8e73b4fbe0340ce67d843d2036f2338878bf8a811d0e6dfba8291b528cee38f
font_02_sfnt_off000130bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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