Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf2f53118a0c98d6…

MALICIOUS

PDF

79.8 KB Created: 2021-09-05 15:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 63cd02fd7205a4e4f0e4a8bc9ecf91c3 SHA-1: b9dba422aa71e8ada4995b1a245a4c85f0cb0774 SHA-256: bf2f53118a0c98d644936f9e7a222ff765043450b83ac506f6abd8fa1c34b2fb
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially malicious or phishing content hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607386127d3be---bosugegejekaxaxen.pdf In PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b220c3a93a---58834929559.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/161254969d4768---fepibitiraxojaru.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/tokojonese.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/4btfpmkalso1sps10ouhbpdtq5/33268908788.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/miporuruzawijuwewojubas.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0260a48a8d---26630880057.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/27eoo8tl28o9ncioehn6k9lf91/wofidadaxowemikej.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/15451447532.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759d3e9bbd7---52313813191.pdfIn PDF document text
    • http://hagelkonzept.com/userfiles/file/84419371460.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/tivigelasedidedazemuwa.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/33376649755.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/fofifuni.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/58990020673.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/janonoji.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/6a8333f2dd5c799f3b3e6c6a73419e29/38089165338.pdfIn PDF document text
    • http://bwc.lt/i/lujelazeve.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/fibewa.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d42f1c8025---puwedidogazap.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/96177300702.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ni3bbfob40jf776ggbrarigfl0/43299558986.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609105e0e22d8---sesuxuvetipoxuxepabil.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/a382bcdeac29aeb791a03dd22ca3c749/28471209409.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=nps+windows+server+2012+r2+pdfPDF 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_off0000d3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0E 17268 bytes
SHA-256: d499f9ef9912936677e50890fa4dbbc6992f02a84245714201ed681739dfac5a
font_02_sfnt_off0001195d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195D 10608 bytes
SHA-256: 6848773490cde55a079389cef7fdf16758a91e0f9a01ba898196fe78394a5af5