Malicious PDF — malware analysis report

Static analysis result for SHA-256 917374db15f2627e…

MALICIOUS

PDF

75.6 KB Created: 2021-09-16 23:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fcfe075221a32cccdd071eac47ad3fc0 SHA-1: 5a19e7b2df51147506455279db401185050d2b17 SHA-256: 917374db15f2627e7123fbc78c09b1533243cccf862fa6c28133c31c3fec9bf5
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://hotelharmika.com/assets/userfiles/files/92015538967.pdf In PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd826cc75c---64464830096.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140595a3cf5f---58240960344.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sinuforezabipekagozapiboj.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/latiritexapilovivutawe.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/58496954825.pdfIn PDF document text
    • https://autoskola-scp.com/files/zanisokakejabuwakik.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/61791268887.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/maxumoli.pdfIn PDF document text
    • http://kkc1.org/htdocs/cljr/data/files/7955135897.pdfIn PDF document text
    • http://sententtech.com/file_media/file_image/file/12291482236.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3db3643f7---40346993237.pdfIn PDF document text
    • https://sibconsulting.com/contents/files/75912340193.pdfIn PDF document text
    • http://ieeepes-thailand.org/app/webroot/files/files/venufusevimuranem.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/51401100604.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613740f7407f7---69609134558.pdfIn PDF document text
    • https://congchungnguyenlieu.vnpec.xyz/uploads/files/tusadoxebupagedetoneke.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/93946375513.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/9c09e705525e7964d1c0ee4a4f244da7/24839263606.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131bea189fff---fasojavezugetiba.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/613ba7be5b2cb.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/tobegakoxitari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=titan+video+player+for+firestickPDF 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_off0000c1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1AA 17764 bytes
SHA-256: d62f62a8639099f308e5dd4fa20575f9ef23085d4ff453a8d8a128782d032077
font_01_sfnt_off0000ef82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10799 10848 bytes
SHA-256: 5badb747d6a7464dabda4fce1a664cf53fb567b75323cf826458391bc078eef5

Open this report in the interactive analyzer, or submit your own file for analysis.