Malicious PDF — malware analysis report

Static analysis result for SHA-256 980de239a04956ab…

MALICIOUS

PDF

118.6 KB Created: 2021-08-25 09:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 69905dc4f0e87ff0490c9e34453337b0 SHA-1: 67849b6c0bf5222222a8682310b5be9b1dd99998 SHA-256: 980de239a04956ab0345f17c8fcd6f2b0dfcd6d08708551d37b8203325f5238a
156 Risk Score

Malware Insights

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

This PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary attack pattern involves directing users to download further malicious content from these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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 http://boxethai38.com/upload/file/lebofuveg.pdf In PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/wizofij.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607422ae2fe2c---57248770663.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/06/16/36540402180.pdfIn PDF document text
    • http://waterreducer.cn/d/files/20963740885.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/xorapatigurebebazomewape.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f41bfaf0a7---gujomawefajilikibunawi.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/63448884992.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8728fdad8a---pilapevuwubeluziseg.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5c5ccbcae---bazozopipeza.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/db2tba93tqnqv7n6681pa0silj/sanatataku.pdfIn PDF document text
    • http://plastikacz.cz/soubory/files/lebagowafeli.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/a6apuspqjhb8hahtodku1s06s9/28958066518.pdfIn PDF document text
    • http://emeat.ru/var/files/loribul.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/82636873111.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23521080251.pdfIn PDF document text
    • https://dannysacademy.com/ckfinder/userfiles/files/698824052.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161234b26e0c23---81601513375.pdfIn PDF document text
    • http://ramenzoni.eu/userfiles/files/54628605016.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/46439232937.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/58282335829.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bada56d3cdf---30576635555.pdfIn PDF document text
    • https://nexusmediation.nl/files/55869410983.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/vbvr69flcm17ir92l61ur25fj1/32954381052.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/rubewuwafugunipusu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=the+red+headed+league+storyPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be41297648a---dinedodinupizimepizubit.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_off0001727e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1727E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A95 10508 bytes
SHA-256: 00dc7f28c099f8c524eea7966f6cfc924a93f27ef1cf9e9a5003bb9af9a94baa
font_02_sfnt_off0001a283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A283 16380 bytes
SHA-256: 7e07acff95a965be2505d6652eca3f846f45e4ff99a491f22fdc2137b96362ef

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