Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e45298b546abe11…

MALICIOUS

PDF

95.0 KB Created: 2021-09-01 02:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b2949e8ba7f07e1e1082cb09278a8aa5 SHA-1: f03aa4d98e9c407e8b7f1eaa87d5b658fd94fc37 SHA-256: 6e45298b546abe11c58f5cf3ee22181649b00bc1c3742e5e0722dab68c12a7bc
156 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm or phishing attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a non-clustered link farm on disposable hosting, and the PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristic points to links on compromised WordPress sites. The presence of these link farms suggests an attempt to manipulate search engine results or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ketchas.ru/uplcv?utm_term=atmospheric+pressure+and+boiling+point+relationship PDF link annotation
    • http://langfordfinancialservices.com/userfiles/files/521805011.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/p5dahn9gkeqb3p4u2cgbrlfhbl/9572636222.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2b0686b3e3---2623221805.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/gazewilidezaz.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991e0d7527f---95944589629.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160a50295e29cf---13366455579.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/opoc4tsmt40iln9nclvmdqgpoo/64001547088.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/47309823477.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/vejuruj.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1nsk1vs94650aqfhafacu6qqt7/25808399701.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082ab7474169---pejexoj.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/68629426625.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/kivojavusatu.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/18bec71d8a87f67736a5c7e7748cb387/bosaxopoxebalatinevir.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/84695850464.pdfIn PDF document text
    • http://chukguwang.com/files/fckeditor/file/50599015043.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecec8b8699---mupefapaluruvapidareje.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/56224836498.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/pekide.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/13490207374.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/wokedavikazofuwitunipog.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/91cb6e0c0e664e1ea86b0a238d865c13/gufuxopinurapi.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/1ad66919e5ab7e8c84df38db52d6238c/92407871463.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_off00010815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10815 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001202c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202C 11184 bytes
SHA-256: 9104bf3c61127de9876745e45f167c0b9ab4a419b43e50a1827cf2f7f5627250
font_02_sfnt_off000139b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B7 19976 bytes
SHA-256: 7dbd137ad8b4601e9420262c7414d8c1aca7c71bc00bde0c10628e0753fb75ef

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