Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ced5be41c04563…

MALICIOUS

PDF

75.9 KB Created: 2021-09-07 01:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1121e4601883eb0a9925a616a5baa394 SHA-1: be42e1b5a624eeefcb4eaaa4b48fa5f6b910cfc2 SHA-256: 69ced5be41c045634830750046c942fe2df143700c989aaad9eac210b8d0c287
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised or disposable hosting domains. These links likely serve to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://autopsrus.com/ckfinder/userfiles/files/37448659807.pdf In PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a28eb8cdd---rufir.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073653e1848e---10873976742.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/puvedekavogijetetew.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/panabizudam.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/woxijawinerinogebusexagi.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f5c004bfee7---wofimokinujunawilelazawi.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/db4c616aab1b07da5fa23679ac233dc9/67834266326.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/tk459aogm4il0qaoidi82sumlg/gefujebuwizozed.pdfIn PDF document text
    • https://nhakhoaanphuoc.vn/uploads/files/29197935553.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f7a3d486f.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/518c62cfb37a1e62b7874f484b632234/fozimexoxisuriri.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/jiresinidanobusovuzu.pdfIn PDF document text
    • http://slxiang.com/v15/Upload/file/2021826132498308.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833a08785ab---wuzewadasetebudutatire.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b89e84965968d5220a1103be617899c3/30475250100.pdfIn PDF document text
    • http://webursitet.org/Files/file/raralixusujawasejopajobox.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/65983063739.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/58400508498.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/82646982940.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/xirukefibaxivu.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/29c0248b8c65f73a3f7848daa0af6b3c/gisinapemuzewud.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210811_03CCAEF425DEBAAC.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff723533bb---5221232091.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=passive+voice+definition+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_off0000c3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3BF 10532 bytes
SHA-256: 727ad6673854c46308b56a9c62b27c99a05a0e0ed57f4a40d11fc6c46c947127
font_01_sfnt_off0000dbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 17996 bytes
SHA-256: c069f771d86ff5ec542b636a161b96eb9fd20d72dbb0f743b35be74a21270106

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