Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceccc648bee4ea35…

MALICIOUS

PDF

239.0 KB Created: 2021-08-06 08:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ee20f59eba4ea6d9f15272781123f579 SHA-1: 1ad7127d46cb0f1e6716a08537634e84e626cdfe SHA-256: ceccc648bee4ea356532ef3c1dc47d6eb4a44c3f519154878686d70428b49858
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, specifically within the 'super-forms' plugin uploads directory, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the embedded links are the primary attack vector, likely leading to the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8792

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 https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/5sthld69a4ikoedbq63e84b3mt/77597208501.pdf In PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/raselusunefoker.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/743aaa38e7ad22926e1eca85d290bb0d/vorumovudegado.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/25636642052.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/xurezutopolatedelilozituw.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/powok.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/56056115312.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160de7ce5d6de6---77685499073.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607747c07a480---kipozitap.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/27497150514.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/88279421552.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/67757904339.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/13482124340.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/6b6129de92a4f3aa093aa411b50b45e8/dekexaxeloxufikoni.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/pufakukitapavu.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/37805366651.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/61101333416.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/48ea1bc02a0da8075a58d29a21d59734/34922637917.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/2891019991.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/wesifowix.pdfIn PDF document text
    • http://burrburroughsfamily.com/clients/55468/File/lafesonexulajudegegafex.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/rorud.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/97036821781.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/61072416741.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/8vohdibptdip6082uios76tp73/nuwodajagafusagitikite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=on+democracy+robert+dahl+chapter+summaryPDF 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_off00034b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34B26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00036338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36338 18564 bytes
SHA-256: bea2cb9ce1e84c2d3862ff41e0ea03a03d44eda127a18da78ae30e389ff6ed4e
font_02_sfnt_off0003932d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3932D 11064 bytes
SHA-256: 3108ebbe96dd740f60620b9240dc2f8a545c87dd756b627bf7df241aa02b7ef9