Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c97f3ee94bf7771…

MALICIOUS

PDF

82.9 KB Created: 2021-06-29 12:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 97a74c1ec5f8f2194c51bdc7a719f82a SHA-1: 5f0955686b80eee30ee7ed3133662c8667b5cb5b SHA-256: 7c97f3ee94bf7771d4d1850db662d444af78e9bba05a6a8c1da72306947ca562
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 http://sibinetweek.ru/userfiles/file/97760524379.pdf In PDF document text
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/xovominazudagobap.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/5839a869aff952390ec1213cf0691111/95735957111.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///75286820509.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/6ae1d19003194975dacfa6403a83f920/36458747177.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609e67f19f658---rarobojumekizazuvimufoji.pdfIn PDF document text
    • http://pronobile.de/catalog/file/62632743375.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/56606449831.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/1a8ed6bb12626217c0285926aa6429b7/zozobizokogezepirip.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/cd26e3e8bd53f8ca554a7d069df0ed77/63159782871.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749e911ad48---relefuketolipakegenajule.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/bejadupiwadafegit.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/wixewisutufegexugenu.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61c2c85c24---regowa.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/f7245d589ab581712e51f89dfa043f36/38848514325.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/8b4a4f3a88a7bc1f19437c4a89cfc4d8/11425846812.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087746ad23bd---12463261336.pdfIn PDF document text
    • http://jfkanacon.org/data/userfiles/files/45138777173.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/cbedef5419521bd71beae597d8e2cfcc/repazilosipa.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a834c4e20e2---90784519948.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/811289413d2d5f2b345d14c47a3ccf19/pogigatogopelenuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=son+in+law+son+in+lawPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF2 17172 bytes
SHA-256: e85aafc284f89b63e0c74abc1c2371bc5ff7571d97d5600a0c09ff9a0b3740b8
font_01_sfnt_off0000f925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF925 9932 bytes
SHA-256: 70f11aae5580cd621857e4f2881fcb45c1f794a7df2aa7a453345483a7ccf572
font_02_sfnt_off00010f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12742 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467

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