Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed0b326211ff3ea…

MALICIOUS

PDF

95.5 KB Created: 2021-08-12 18:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0ed45ecaa52972c33ad7e5a17329d10a SHA-1: 30d3a2f628dcb157507506c61f36fcdfffc9b8d1 SHA-256: 9ed0b326211ff3ead1385b5435ac7fbbebf5de429f33dc6181784b2f450d48fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm with multiple URLs pointing to potentially compromised websites or disposable hosting, designed to redirect users to malicious content. The presence of these links suggests an attempt to trick users into visiting malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://learningkey.org/userfiles/saxufinixikov.pdf In PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/71130800872.pdfIn PDF document text
    • http://revtechnik.cz/userfiles/file/zekujaruxonapuzu.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f6e6f0cae---36880487267.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a791c0b6deb---66009951226.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a269fcc607c---xijawulotonimogenevidus.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/v46at1kb4fbg5ghdsgk37esrv3/70305993552.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078476ba2d17---ponitelulumotuvuzosulivu.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/97822559865.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e606ec41a06---73047492671.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8f94e6281---jokutubilivadizimezul.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/be519460f357b7379cf26bb84c8b609b/53633595113.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f88ce4f0069---netanumimenoruberekomexa.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/viderenuxezuweguvag.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/jirozedoxabomugajekur.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/vegoxaletokametulukuxase.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/77470704008.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609780fc589b2---88671761696.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d624d14f6d---2090002969.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/nijawunonenuzokotajunewa.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/kuzoxekuzeri.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/dosifuxebiliv.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210713175745.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c227a87d274---marawabujuwegepejiranoxu.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/bukosewejavawupokabega.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/60260615619.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/ramajipajebesefi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=modelo+teorico+de+las+14+necesidades+de+virginia+hendersonPDF 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_off00010db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB1 17980 bytes
SHA-256: 6c6e14b7e1d6e8b398b001a6c3ec68d472806b8a2ca30be93301164b83449b16
font_01_sfnt_off00013bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCA 10836 bytes
SHA-256: 596326e5d6818af7833ca45659175d389ada45b2b620a3fc9a1a37cc60072d39
font_02_sfnt_off000154a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1