Malicious PDF — malware analysis report

Static analysis result for SHA-256 111aeedbaac74f3f…

MALICIOUS

PDF

217.9 KB Created: 2021-07-07 05:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: deb29629d375e3c2d3873ba2ea175867 SHA-1: cce3da68795da717dbb72eb5f0685d93899fd41f SHA-256: 111aeedbaac74f3f31a6d05dcebd66ba015047a16aca21701d9fe8b32b528ac5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 5

  • 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.
  • 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://orvosvalaszto.hu/uploads/files/zowiturepazezilopej.pdf In PDF document text
    • http://csc0516.com/userfiles/file/20210621221120_zx4373.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16093741cf3015---vilafezoteso.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609edab3f37c7---71240777747.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/julemewivadabovujuje.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f2db0c710---45510730744.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/66e56501b28c2998d824ed07f4118cfc/wetunuv.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/9baadfeffc6c8996a7babd953286850f/92897526344.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/96364571272.pdfIn PDF document text
    • https://bem-sa.com/img/file/vejif.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/66418848602.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/40528a448a57911e9c86cf76d02ac9b2/12162024507.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f297e5e3c---telezu.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/52920683307.pdfIn PDF document text
    • http://edgecs.net/documents/xodanewopavubefijagawe.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/lfq4ear53re0svp5jibucnq14l/94506287366.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/46273476682.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/90d05978361e88a8aff1a12cfb2b31c0/85978189929.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607eeae2e1aa3---22256929755.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/buzekavudob.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/sofopipi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=kamasutra+a+tale+of+love+full+movie+watch+onlinePDF 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_off0002f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F377 20040 bytes
SHA-256: 87157e0e86d05743d6fdd21c9c96a71ed0630f84b0b6083f41e0ace632f04040
font_01_sfnt_off00032873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32873 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003408a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3408A 10844 bytes
SHA-256: 316fc63ceb5ff16fb3d31ffd3e4851e9e2d8c276a91acb9a4e9ac44c031bf830