Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb6dcec6744e75d…

MALICIOUS

PDF

92.4 KB Created: 2021-10-15 22:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8b08adbd674f2cc427566f7dd9ca369e SHA-1: 80481d71ff11188acb834635d2f1bf671612323d SHA-256: 1fb6dcec6744e75d3d5e9e5a46ae7a9eb8d63b43920702ee45767774503af00f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to external websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://krantiservice.com/ckfinder/userfiles/files/66099348092.pdf In PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5b7cd312e---kerubedugatenowo.pdfIn PDF document text
    • https://purefeeling8.com/data/file/lesokojo.pdfIn PDF document text
    • https://pro-biomed.com/admin/userfiles/file/6059213606.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/88993111627.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/59c9946282243b0a584b63a38f813000/64260903496.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/69256254801.pdfIn PDF document text
    • http://www.buildonhope.org/file/lojejib.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f565649795---dakoxe.pdfIn PDF document text
    • http://topliving.sk/userfiles/file/30168356691.pdfIn PDF document text
    • https://yogaspotny.com/userfiles/file/bilamunaraki.pdfIn PDF document text
    • http://torby.kbo.pl/ckfinder/userfiles/files/40247522224.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/dazavi.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/dasarodov.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/45570483285.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/lojogaripiwuw.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/93349228386.pdfIn PDF document text
    • http://ghemassagenhatban.vn/Images_upload/files/baguv.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/161477a3be5995---tizupomibe.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/39446994883.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/nutokidonavonawu.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/bonegurivizunivaka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/cmwvf4RlXg4/uplcv?utm_term=how+to+cite+a+graph+in+a+powerpoint+presentationPDF 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_off0001003c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003C 10684 bytes
SHA-256: 2e259377ca18ab3f6181883467e814a5a092597ab305db686a25b817515c8f09
font_01_sfnt_off000118bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BB 18960 bytes
SHA-256: cd41e09506270bce4e754d4a6ca924bc71b49555136ce1100e2ef707be15af70
font_02_sfnt_off000149bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1