Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa17421dfd9e135…

MALICIOUS

PDF

87.8 KB Created: 2021-07-18 05:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 79faacaf024fd15f2a6eeef6a819cc5c SHA-1: 1823d9a8690d1f4cad3b823dff367f64cbdcf106 SHA-256: 5fa17421dfd9e135bb28e9ab8cd817b476a651e2f2e8944d8db19eb9cdeab6bf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating an attempt to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/5airtbmbk3mnv9cljrrvkiglm5/68217915434.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ce2dca5b8---pezogo.pdf
    • https://realxenon.ru/uploads/files/daruwofojularolunuzufubi.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d30cc12913---36649947693.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/40b511cf3bbac84c8d9c8286a536bed4/20812105969.pdf
    • https://west-holding.com/userfiles/file/rogakipuragumomejuzaxidu.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/c7b72e5f0ca83034a6a053f3208bb8ce/34534893799.pdf
    • http://ozanatalan.com/iboard/includes/userfiles/files/gunuvom.pdf
    • http://skrabl.pl/www/rpbd/fck/file/95529127211.pdf
    • http://due.pt/js/ckfinder/userfiles/files/95012507208.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/02ba6db8e12605a7c812d3f06ced1cf1/66001197411.pdf
    • http://imaginove.eu/data/Files/didutusibuvem.pdf
    • https://thefertilizerequipment.com/d/files/musamafekitu.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b6915ad38---pamexupoxepo.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/36025923628.pdf
    • http://paoladebenedetti.eu/userfiles/files/75967368491.pdf
    • https://davidfoleyinc.com/userfiles/file/34543284053.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8484c1192---78188932830.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a153fc07b7a---53728291620.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a696c596af8---92057999736.pdf
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/56875725913.pdf
    • http://aostavet.it/userfiles/files/raxijuwinatatajevegaz.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/eb5fcf710a545ec2950b493fb140f4ea/guladarumafotefusa.pdf
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c7284612765---zexomizusokomusubijifi.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/6c4a5440cbf63c6b41f0f5125945e63c/bukip.pdf
    • http://maekalocal.com/Maeka/UserFiles/File/dajovasaral.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=one+droopy+eye
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c0.bin
4ed65796afa72bc350ee72c8d5892bf3143347b330194d63aacb78803bdc2b21
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 9960 bytes
font_01_sfnt_off00010dd7.bin
d888af5af67575f1cebf2dbf4dfe41ae63b507671bdde3f37bea8a85cfa89ab6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD7 16900 bytes
font_02_sfnt_off000139d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x139D7 16792 bytes