Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5040e329b765ab…

MALICIOUS

PDF

76.4 KB Created: 2021-09-06 09:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 46cac62aa3a74f4984ec4e0af09132f1 SHA-1: afc42339c247d44f3944909159670584d23ce3c1 SHA-256: 5e5040e329b765ab29d5e2c6e68c09e403092e4d7c36136a840821552dafeaa4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised websites or disposable hosting, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://moiarchitekci.pl/pliki/file/godopagumuxexipov.pdf In PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf70686e44---fobisukavenoborufejodi.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/tojezen.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b27f4b5b69---xipetozawunizibef.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/wudimefufubozekovar.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/tawaxurunagi.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/rovofagosuxozoxosut.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/bba7df81f611418ef0b2860df1e7cfb3/vilonivorigasategipokor.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160be557d0f8b4---tabozozesajekigivotere.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/kisusexoz.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/sovedapuxugeru.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/figuvuxexorexi.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/0767ff865750f4646081439988ae8b53/pufijupub.pdfIn PDF document text
    • https://tsegypt.com/file/pilawadadoreduxafute.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/bemizezodudarozovobuxino.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae82e437afc---99772290214.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///39565530969.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161061c036038b---88393461100.pdfIn PDF document text
    • https://anaksemut.com/contents/files/demikotejen.pdfIn PDF document text
    • http://teifsepahan.com/files/file/tomibajij.pdfIn PDF document text
    • http://teraval.cz/res/file/kojirila.pdfIn PDF document text
    • http://thoitrangvabaoho.com/Images_upload/files/89950980149.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/20023ba1db4a2c7aac7fb85a61f74095/jutilusomutonewog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=mens+shorts+sewing+pattern+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_off0000c6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D3 17156 bytes
SHA-256: 58a84fa40238e7220b7e49be2e55d705fed2bbd7413acf1d344b6fc99318ada6
font_01_sfnt_off0000f344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF344 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5B 10808 bytes
SHA-256: 21ecd10736d21c2fed21067533dff3e29206647de19dd44c25b60037bb8346a5

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