Malicious PDF — malware analysis report

Static analysis result for SHA-256 060c25c2eb0634ff…

MALICIOUS

PDF

92.3 KB Created: 2021-07-08 05:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8cf99a7bbe45fa567afaec5aae3d4738 SHA-1: 6d9d8f2138149de924c6b2b2417b2e445a636fea SHA-256: 060c25c2eb0634ff1b6dc90bb15b5e42e69c8ecc730b5da62961f8e68864ca7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent. The primary attack pattern involves luring users through a malicious attachment to a series of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/3a7c0f7dce3279fd25e337203a87e7b6/wasukefojidefuduzonenuwit.pdf In PDF document text
    • http://aite-materials.com/upfiles/file/supudesalelulegeboniniwi.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a369a88f1---fokix.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7499fb1db3---basetigikadifito.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbdae2b1a3---41314208094.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/91269303985.pdfIn PDF document text
    • http://boxethai38.com/upload/file/64891228736.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/9f695afb4bdb8c7ce691ce4011dafca6/89813962727.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/fikitigubepodasizekizeno.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/ofvpdrp2679p4oq6hnd6qjee03/39965643393.pdfIn PDF document text
    • https://ivanamihic.com//files/kobavifoxox.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/letizurasobul.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/07d6740dd3111440e54f19be4164a639/baxadowevetiremu.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/p422onbgt98md6a4jj6eii7eme/62183417462.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/eb55d74503d78a784ef824ddd40b3e75/rowurozubujedekonata.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/dusupizawata.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608662dbcecd9---rovakuwakigogime.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aba41da4a5e---90451094349.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/89009111240.pdfIn PDF document text
    • http://phongkhamthienhoa.vn/images/files/90017634133.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f891709ba3---xevavikojaliporogazodeso.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210617_DE65927234C629F4.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d8a8c520eee---95638785217.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/12175679092.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/accbf27a3f8f456bea15b09195818cc0/vikuzudefumodudo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=types+of+storylinesPDF 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_off0001082d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001203f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203F 17104 bytes
SHA-256: 503b242240f396a70e8580d50df2b4e5c8d6bd28847c99af96a792037e4a464b
font_02_sfnt_off00014cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD0 10268 bytes
SHA-256: c1ab72283d4f41a8481feaa2064c31022cb40a20ab57174645fd316285a93773