Malicious PDF — malware analysis report

Static analysis result for SHA-256 169001d1302253fe…

MALICIOUS

PDF

79.8 KB Created: 2021-10-20 11:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1f5da9327ae3d7f4dbf7da1307715539 SHA-1: be822ad13133c0de047e5d735acca761864528b3 SHA-256: 169001d1302253fee3856f3c1c7d72fe5b04d9883bf5e692382fe39cc99d5e29
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to potentially compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall detection profile strongly suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.iuoelocal870.com/kaizen/ckfinder/userfiles/files/35259970049.pdf In PDF document text
    • https://www.douggoodkin.com/admin/ckfinder/userfiles/files/7054437871.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/zimadole.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/fevomikuk.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/30688481421.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/36593632448.pdfIn PDF document text
    • http://moristas.com/userfiles/files/89603411497.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/3774469693.pdfIn PDF document text
    • http://hiddengemsbookstore.com/userfiles/file/47755584388.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/87344163903.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/23070858273.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/9929743903.pdfIn PDF document text
    • https://zlato-invest.cz/upload/files/rabalazoxuzax.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9a2fcbc3c---nemamoroz.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/61101upng08elvcjqmpmqpj3se/1386225876.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/36854020793.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/52489798199.pdfIn PDF document text
    • http://wamer.org/userfiles/file/26214293008.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/verajonebilivugofebosir.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/kuwov.pdfIn PDF document text
    • https://csam-villepinte.org/uploads/images/file/sawap.pdfIn PDF document text
    • http://tivati.com/uploads/userfiles/file/ginevobuliw.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/ff4f1557230cd9ff8414b2984a71330a/xanuje.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/4dZi1sgP-vI/uplcv?utm_term=ejercicios+repaso+matematicas+6+primaria+saviaPDF 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_off0000ced0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 19308 bytes
SHA-256: 4578de2f9505bbdb45771e418a16616ea871ebaa43fea408fb7eb362967d203d
font_02_sfnt_off000116e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E9 10732 bytes
SHA-256: 0dc5f0ff00aedea11cd2ea8dc81396c8c821d03aca0e7e93f3804b7ac8abc09c