Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1d2a09f09da683…

MALICIOUS

PDF

74.2 KB Created: 2021-07-20 20:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dc3d77da754129b9a2d70b98bc231d82 SHA-1: e393096492190e8452b35942b8561793c295d4b1 SHA-256: fd1d2a09f09da6836e1a356ce776005bdc040313dc9088837ffde3f2e0f91652
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress installations. The primary purpose seems to be directing users to potentially malicious websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/f932ee9b5cffd81910a9b2836e4c16b5/98706432490.pdf In PDF document text
    • http://rolmech-strzelno.pl/Upload/file/92801647247.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f020783bdb6---45380154796.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df52f24436---motewogaxu.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78545f0293---zinatawajegadejotasaxad.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/a4a71e2dd997edc72eb570ac32f3fcd8/5154882511.pdfIn PDF document text
    • http://iphysiology.ru/upload/5657389887.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/lemunakakirukax.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/wifanokobonif.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098428e09971---ralutikunufenixarovaf.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/gafirilum.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/jidukogaf.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/mefokorodadijakajo.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/84750663857.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606c76eaabcc1---fivisego.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758c32da736---koguvumijisatunos.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/54908161112.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16078393b63125---davari.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/29999868916.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/21q2id21ed40fvpulbmmsvmcef/86039603908.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/toraxu.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/wipulaxejimibud.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/f930c17625a8eb04cb684d7e97634142/divokibedemalitavofe.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/58776754125.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=stack+using+class+in+c%2B%2BPDF 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_off0000be91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE91 17524 bytes
SHA-256: 7757cb9117f9cd02b8adb88d7fc79a5e7749808f4c678c540b4276e3654f7f4d
font_01_sfnt_off0000ec23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC23 10320 bytes
SHA-256: a34c5f4abe11fcdf137272aabb6e6f65a92943508157a926233fcb329ecf8d30
font_02_sfnt_off00010382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10382 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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