Malicious PDF — malware analysis report

Static analysis result for SHA-256 519926691de1d2bd…

MALICIOUS

PDF

73.4 KB Created: 2021-06-25 18:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60be76a53ccac7930c8bf66238d22a2a SHA-1: 6a1a6a99e52140c3f9d285b894ffa3392c4fec4c SHA-256: 519926691de1d2bd6aa8178c9956535a5125cec44bceeab65cd72a481ccda129
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites hosting what appear to be further PDF documents. These link farms are likely intended to redirect users to malicious content or phishing pages, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cb803c72b91---nimanuwelobemi.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/dqmej5cojl50n5gop4s36a4esa/wuxutepilisutaronuxisafon.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/7c2ee5df09e7fd1a12857552d5c24544/satejipezaxomolumif.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/b6a1d6130dec2b1a2fec17241011835f/farowutixubobijomubu.pdf
    • http://cnpair.com/userfiles/file/furinanirig.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/545d23a14ac3bcd87c020cf1e13f8557/weremoluj.pdf
    • http://minuspk.ru/minuspk.ru/userfiles/file/96287511935.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/pp867mgcdmqe27da3rq004lmq0/58370395070.pdf
    • http://belgium-ex.com/images/blog//file/fobafegozawakipifikaru.pdf
    • https://arnetbilgisayar.com/upload/ckfinder/files/35970498306.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607132885d637---japajubajunapuruwilusirup.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/a919a838818548c550b960af27eb7559/81252209763.pdf
    • http://asustainable.com/global/file/38585748975.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce62a65a94---89783911247.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/2gbcl8ugbt3l8fmtoiv6qlm0i1/9474655570.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/4hijid0ob8n7rofb8cqg29bbfm/rabefimefezidotun.pdf
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/pibezikenodewuxunu.pdf
    • https://getadoc.in/ckfinder/userfiles/files/83193451005.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/jh33b29e0seb7gu1r10729bv17/tobin.pdf
    • http://vodnik48.ru/content/file/vamubiluvob.pdf
    • http://altinay-law.com/images/file/moxizovavapixuxeduludev.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/oesn48e5f4dq1ic4minqli8qd3/saweviniz.pdf
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/54598894908.pdf
    • http://xn--49s538bo8ux8c.net/userfiles/file/88445964613.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3e918edf2---kivenajekefovilawoda.pdf
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/d860527fbbefba8fe5396df06d3779a6/kevuvutetagopunek.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/806e3d46aa8d2e098cd072fcb797035b/5275565338.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=appellate+meaning+in+bengali
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbe0.bin
6e4e9dc777c676fb35d8914adf211947353ff2553282b54d7f06aee1cf7c83a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE0 17408 bytes
font_01_sfnt_off0000e963.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE963 16792 bytes
font_02_sfnt_off0001017a.bin
574eba65e7b2e2e1499e2254f85b387f7cf488b877bd3ad040e745bb1545a5d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1017A 10328 bytes

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