Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0cad7e666c0168…

MALICIOUS

PDF

81.9 KB Created: 2021-08-30 03:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 73322030ce0798f382e3149f48b789ae SHA-1: 778f89f49aa9f9019535363854e9a8c3b99d9b26 SHA-256: 1c0cad7e666c0168fd6d261875011bf30df3a4f613803bfeb5c1163ba6c6b4fb
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised websites, likely to host further malicious content or phishing pages. The presence of numerous external URIs and compromised CMS upload links points to a coordinated effort to distribute malware or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/gd37hqgpt7g1iboijhgnegfint/zudefuwajopetogokenotez.pdf In PDF document text
    • http://air-ned.com/uploads/files/72298809443.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210606_AB968C0D51AFF4EF.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/bebibod.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/b7d0727b16cf4373fac8fb22052ea995/tumativakoz.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810d1c8f3ae---wesukesasononukupevotuku.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608842210d1b9---13021538565.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nofugoliselerexupafakef.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/r6ori3t76pp9nlhjgh49rhq1q9/97114117384.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/ac4317b07e611f8dbd629d7d2a357cff/48822707395.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/sidukowesewo.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/47331347632.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/fcb7357d0f57b042b8990b0f9157b599/32285182820.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/065258f0129f5fd14d8954d2cd46ea63/sotafatutulo.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/36995264409.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/30fda1871a5c0955d0c10b333c135b98/ganodalipal.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/9319067454.pdfIn PDF document text
    • http://topas.lt/userfiles/file/takotigeropike.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/62162474172.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a26fbf0ba---lejomesefovosizoli.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/bofidozosizedeme.pdfIn PDF document text
    • http://7onseventh.org/clients/868256/File/62819241246.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/dd621002e71d4e8e3b29fdf083578232/sixonavovakur.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b248a681466---19686681060.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1cee6d01e---kavodawo.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/25398804915.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=all+locate+commands+minecraftPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6C 17312 bytes
SHA-256: 74e8311d2e869a7af5e3e8ca979412cc43ac83187715383d38fbe22019fda85d
font_01_sfnt_off000108f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001210b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210B 10620 bytes
SHA-256: e70d4c1a115b7f20895ddada3ebe866f95268261d4f0aeccc55afecb750783b5

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