Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e14e87ec6a70ef…

MALICIOUS

PDF

75.2 KB Created: 2021-07-03 07:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c39ab99dde9f88b68b5bc74e003a34f5 SHA-1: 11a9a370e46255a710231d3fcbc53ebb57cb81cd SHA-256: 85e14e87ec6a70efdcca998e13f6d61a9c5afe083c95c7ea6e72ad0a086ac567
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to lure users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://jun-travel.com/userfiles/file/38690900025.pdf In PDF document text
    • http://www.bash.cl/media/file/gilomegikom.pdfIn PDF document text
    • http://alakharia.com/public_html/userfiles/file/43016667268.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/40edf636a95d05fd6fe730f1469a78be/jaxegabezit.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/zulikoniximuruxibuven.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609dca0a0fa51---82160372662.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/mupivezitimufazakixuzuni.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160809f04e7c11---manimur.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9d2e3ce13---fabawasariwave.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b80ce50a975---potemixeginixofavibuf.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/vopedadoj.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/37316240865.pdfIn PDF document text
    • https://majubesar.info/contents//files/25021822460.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/12f87c17a4f497e5b3f0c4275c78d6dd/63723861270.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/f7eae7253631820e538928ab278a8733/bisububemivedaregotegimam.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160cb62acb5c12---mabekan.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/gifegowexopolaxumafigi.pdfIn PDF document text
    • http://icsbc.ru/fuploader//file/49265826035.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/659778e66d23484f0f356501f712411b/relubawufavexopanaxu.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/52821404417.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/km46805an822d22nd3pnb31rvi/ketapasegezimi.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/5n2bqaulnlgfu5tlifcndptono/zuvot.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/74971755117.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=chf+to+rmPDF 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_off0000c5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D3 17060 bytes
SHA-256: cf4c28e0ad2463b942c74d857e04776f67cf85f2d5de5fb994021c5b2c66dcb5
font_01_sfnt_off0000f29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB1 9804 bytes
SHA-256: 10a33850cd738a050b9c68d188bfb97652fb6c22e2aa210485950155f1e33777

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