Malicious PDF — malware analysis report

Static analysis result for SHA-256 d606774af62fc0b3…

MALICIOUS

PDF

84.9 KB Created: 2021-09-07 08:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 49296200bf94cf5b49e386e99a05ccb0 SHA-1: f529655d703ef662019ba637ad8e5bd29dd6584e SHA-256: d606774af62fc0b30cd67182e63299fdf6308c39757fea474db7f8f93d2793a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF format can embed JavaScript, and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests an attempt to manipulate search engine results or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://profil-metall.de/content/uploads/file/44340226326.pdf In PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/ca5d3223e7a58e09c422084ac7e8221a/19686270071.pdfIn PDF document text
    • http://devison-matras.com/upload/file/lomavuloligaj.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210803_044142.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/25500164272.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac607d33f41---69970017482.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/8071062a6381fb0a2740e72350479479/matoxafote.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/jolilijediroretipebex.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aabc37f0590---69869940717.pdfIn PDF document text
    • http://irths.com/upload_files/files/82020563530.pdfIn PDF document text
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/dedijewusefaruzojukaname.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/43027200361.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82ce0eedfd---demutuvibekedufizewovodom.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/ba9a5f972e07d6e6bbef833ce218f3dc/rodulofowewovuj.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/matilizijixeratisilewaxi.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/lagelosidimumuxomideniz.pdfIn PDF document text
    • https://satesayap.com/contents/files/26143507869.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/kotibidesatujaxowibibixo.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7a44716be---timivawagaxubawinomedaxeg.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20218144020583.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/21662047026.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b5a89e4de---roxosuzibasodoz.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/60219942878.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/rodowotakuro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=trigonometry+problems+for+class+10+with+solutions+pdf+downloadPDF 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_off0000e0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BC 18752 bytes
SHA-256: 1a61490a0fdeac232cdef2070ba0bf4b201141772bbf50059c1db9164efa8ab5
font_01_sfnt_off000111d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EF 11644 bytes
SHA-256: 67e8b732fe601152bca938f684b34ae58ddc4174bfa2ceba4621b5a8a5b7b8ec