Malicious PDF — malware analysis report

Static analysis result for SHA-256 5972a291d03a3f9d…

MALICIOUS

PDF

72.7 KB Created: 2021-09-11 02:35:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 118bca13143c628abd022786af5e4b9e SHA-1: a128fa6b70425812013c22c6897c0e584e79cd4b SHA-256: 5972a291d03a3f9d59da3ac41da6f07de68f3ee58b441de1afa65f6237e6a55e
176 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The presence of raw IP addresses in URIs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://soccerauquebec.com/userfiles/file/jofejanegobu.pdf In PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/88904460782.pdfPDF link annotation
    • https://vresponse.net/userfiles/file/dusafevidipazelu.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/95807752046.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/94893143762.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/380341d28954bbd1b65209c86661bd1f/gulujinavuzu.pdfIn PDF document text
    • http://savaksangida.com/resimler/files/xovires.pdfIn PDF document text
    • http://seasonmediagroup.com/pic/file/jemivojunozunisaxizuke.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kuwopufunu.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/zixusodafomuxerig.pdfIn PDF document text
    • http://faptvmedia.com/userfiles/file/xikemananelerabilobelodin.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/161313bd14a995---nefixevuzinijirelajovev.pdfIn PDF document text
    • http://cityfate.com/files/files/wazopubanidafugulewovujo.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/roxupap.pdfIn PDF document text
    • https://kawanmto.org/contents/files/vitetov.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/17718935862.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/23166174176.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16136c78364a9c---73469312050.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/gevudapakibizonel.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/gavedawodu.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613257c5c4307---pegekesa.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/gevirifafuwesudupuj.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/58469514330.pdfIn PDF document text
    • http://bbmpva.nl/fckassets/file/98372020878.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/tutobulumirusaribuzasu.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/71911316323.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=step+pedometer+app+for+androidPDF 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_off0000bc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD484 10520 bytes
SHA-256: 711d7c09f9462ec7b1a1040a24788027f8f82c85d91ae24e141b516cbccd22b8
font_02_sfnt_off0000ec63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC63 15972 bytes
SHA-256: cd5101b3eb744788aafa4766568e6e5a39cc5fb37117d87a4153b9d8e2de3d15

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