Malicious PDF — malware analysis report

Static analysis result for SHA-256 694b04b152a63fa2…

MALICIOUS

PDF

213.5 KB Created: 2021-09-05 22:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1cc119c67aca8ee7e453952ca7a298fe SHA-1: a39036acb3bd79a85dce7902d60332d1cdb78dc9 SHA-256: 694b04b152a63fa24e4d0ddcc1549fc0d638ee887ae4766f25ed0eb836fc4dcd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, which are likely hosting malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded JavaScript, though not directly analyzed for specific actions, suggests an attempt to execute code or exploit vulnerabilities within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

Heuristics 5

  • 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.
  • 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.pattyn360.com/upload/forum/files/22928949295.pdf In PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/4a455da4046d21d92ad960e906048888/gupeti.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/49826178714.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/42d747b3e5cb13756f9941b948d37e44/36587273938.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/62941282818.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/15178909810.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b038c15313---26859843001.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/rexofuruvizowukalulurezas.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/et3kq26hrcs1f9ccab10sjoki7/30277994663.pdfIn PDF document text
    • https://granitnet.hu/editor_up/99929025886.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/55345260223.pdfIn PDF document text
    • https://vestol.bg/files/file/44032557899.pdfIn PDF document text
    • https://hssanesteban.cl/files/40891698537.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882b3bc45a5---83977804970.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/rbijikvl0hrlfggugsek7dgbid/lodojivaximinimaxebixo.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/wewemesikelizedukur.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/xalotawuxo.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/41472101029.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16071216e636c1---pinef.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/bezapilevaro.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/54995276053.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/puvinopipanalunebalosafe.pdfIn PDF document text
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles//files/82559270978.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=gaudete+et+exsultate+pdf+polskiPDF 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_off0002e38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E38A 20556 bytes
SHA-256: e4db0f79fa1baea4f6a18b9d5532c088c547c698f244104da009c0f71114c32c
font_01_sfnt_off000315cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315CD 10620 bytes
SHA-256: a46304e55f70b6183f3e112a38117c92fdaef1120ae700aceb4f1a4f8bb72496
font_02_sfnt_off00032e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1