Malicious PDF — malware analysis report

Static analysis result for SHA-256 126e774ce0a3d996…

MALICIOUS

PDF

82.7 KB Created: 2021-09-15 17:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ab0d109a1040f591b54796eb54290e6b SHA-1: d07c626eabbd9b85578526a6057e6670a8d7dece SHA-256: 126e774ce0a3d996379b1b443d44c3e5d79c7ae1e0ee98213413ee28822c0d08
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://email-database.info/userfiles/file/15356966298.pdf In PDF document text
    • http://www.siposferenc.hu/html/fevagaxogajafavuwesoresun.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/50440295939.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2286b277b---32644383286.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/89288184533.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/15570841292.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/jixekelanuzelisaki.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/389rj5snci9hq2a2uo43kv740s/58185008248.pdfIn PDF document text
    • https://thietbigas.net/media/files/43749879312.pdfIn PDF document text
    • http://shahgrp.com/uploads/12026108611.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ef7c6cbb2---weresipatofo.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/rogenomabadadozoki.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/fujimuvokaribiresov.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303b94434dd---wegodapejofesejumuzawu.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/4050117102.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131a8c8bb865---gigife.pdfIn PDF document text
    • http://grupophi.es/uploads/files/kukasuxemiz.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/bulalovinav.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/21572174072.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/73946847519.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613721ceb4ed6---zozuxegekeriretorov.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/21033842736.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613efbd59468a---74339977369.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/39371974470.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/likikozovu.pdfIn PDF document text
    • http://tries.cz/media/images/upload/file/28617968567.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=stranger+chat+apk+downloadPDF 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_off0000de8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8D 17576 bytes
SHA-256: fd14c991ae45dbacac6d60a527696106572523d1c4a7096971d36df28095a9cd
font_01_sfnt_off00010c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001242f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242F 10784 bytes
SHA-256: b5f95ccb04f9803563deccbc77fffbb3d3cf7c57f92e3a7562a6448315adba97

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