Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeae98e1ec850c62…

MALICIOUS

PDF

79.3 KB Created: 2021-09-05 09:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 94b515a924891197e4bf28433126157a SHA-1: 68b031b35d5aeb979347d4175dc468cd5548571a SHA-256: eeae98e1ec850c62ce207d941bb0019e2be6041da253933928b3c38b8c719623
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and links to compromised WordPress uploads, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a high likelihood of it being used as a lure, potentially for downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=haynes+manual+ford+fiesta+2012 PDF link annotation
    • https://bamor.org/userfiles/file/13509362842.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e19e354e8c---xupisokebaroruworenuputu.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/1384802111.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/rijuzagiporexekip.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/vifisafifinag.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/8ae6df9e0503eb49c8a3e0396ed6add1/99549406495.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/cltk1ip4pdfqgmfodj1k5sf7bg/bivopexidaxirakepewubeziw.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160797286f3b0f---bozolowisuroxegux.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/relekavemibelebateg.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/56767810152.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/nekorasimolepiwuwo.pdfIn PDF document text
    • https://viceda.com/userfiles/file/99338193369.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088ff516211c---28838484349.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/damudagevatedegeju.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/b76c080024f8f78c7abe5a167cfb5ccf/lavonijefifaresefo.pdfIn PDF document text
    • http://orrizon.ru/images/file/bozapegumusowirikodudero.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc5a1bd781---87439990879.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ba31c57996c---10186243148.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/31012979995.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/1333935098.pdfIn PDF document text
    • http://vonkoenigsmund.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c75bb638cc---31064300523.pdfIn PDF document text
    • http://mega-gold.com/userfiles/files/46843739797.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7729315311---miline.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/sipikuv.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_off0000d2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A9 11016 bytes
SHA-256: b93cbab2ae8b866690eaf050bb526a7862b405a6b7260bb148a266bbd4c3e5a7
font_01_sfnt_off0000ec43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC43 16744 bytes
SHA-256: 16695422f66564071b53c900eab9e18cf5ae728690ab64e6faa5d87fc595a1c5
font_02_sfnt_off00011797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11797 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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