Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f136e2d32bc874a…

MALICIOUS

PDF

84.9 KB Created: 2021-09-04 10:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d97ed9a4cc263ab8b5073d0cfd0e998f SHA-1: 7637a2137570516a876ce65b01c8127baec6ceb6 SHA-256: 9f136e2d32bc874a0168d741556d9bf070aed17ce2b1a35904c156c4151ee15e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a ClamAV signature and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories and disposable hosting. These links likely lead to further malicious content or phishing pages, suggesting an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://garglob.ru/uplcv?utm_term=inbound+and+outbound+logistics+management+pdf PDF link annotation
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a83a33756---60376586190.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/86203193387.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/34191350622.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/82209001662.pdfIn PDF document text
    • http://lhsclassof77.com/clients/34792/File/27040979295.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/fovobutejopunotodola.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/2dd7b79a7e809397c350cb72722236b4/xukofavuwokaruba.pdfIn PDF document text
    • http://askort.pl/Upload/file/37109612230.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/96156502067.pdfIn PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/bipuf.pdfIn PDF document text
    • https://omegaplus.bg/uploads/pages/files/pumepujego.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160caa5e066b86---21168257413.pdfIn PDF document text
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/kiferunuzixefig.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a615c6cb768---kimemaxufo.pdfIn PDF document text
    • http://houselandia.ru/files/64912566066.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/liliwunalavinulagolapu.pdfIn PDF document text
    • https://ratodua.com/contents/files/kudiwusevegiziji.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e85d545ed---dareroxudin.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/tijiwug.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021051418541541.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/ninepudepumilezibez.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/51587300145.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/f05335b6487c65401d17c3f72a4cd7be/kijixujubob.pdfIn PDF document text
    • 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_off0000e5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E3 18088 bytes
SHA-256: 781f944b26484e1a2890e7b37ad04e3148c6baff7d1eee4f1e0625974e27525e
font_01_sfnt_off000114be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD5 11052 bytes
SHA-256: 099cb8b03ace46943832ca1e21967dde63d4f88878ebaafb84edea2ee7a39487

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