Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65cc934253b069a…

MALICIOUS

PDF

87.4 KB Created: 2021-07-24 10:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fe2fd465b5176fcc012beab92c0e844c SHA-1: ea2f7fd45a729bce06b931e9bd6cd92040b1b3f8 SHA-256: e65cc934253b069a5400e1b35fcccae2eadbeae4ccdfc356ccc52caa582ef57f
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, including one that directly uses an IP address, indicating an attempt to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple links to compromised CMS uploads further supports this, as these are often used to host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095964377b7c---nojikulirejitifovasog.pdf In PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/d9ec544a9b8d4afb2ec5786dd840e658/xuzutimilasis.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/5af9f9a6a896b456470f23193be81200/26944699286.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/bb5e6d0997dc8abf373ba17d3b11cfd3/pinaxopavipiruzinefewum.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/gewosazunuxap.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/a9a46966d2894b52f0801e957c417ef8/44873351302.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/6689738cc472477751942faca4b03ac9/zigomunifutipakak.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdaf1e11dd7---wepuxujezadafabazogi.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/48f5f3f7971ed7ca31aa5e8662d4a8da/faxedore.pdfIn PDF document text
    • http://newo.ru/files/files/23363537762.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210624230520.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/25198853962.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f500e21390---tuwekiketuzujokonilirim.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/noful.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/meguvedoduk.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/6053444593.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/bff2c3dfe70a5196fb1a541ef350756b/dazidesarow.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b883b02f4f7---17336087176.pdfIn PDF document text
    • http://ypdtools.com/ckfinder/images_store/files/55302799295.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/31441394686.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff22521e24---nopukasupe.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/5ca15182ef1241d13b4268878046a717/rogasu.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/79814852589.pdfPDF link annotation
    • http://infoegrafica.com/userfiles/files/lupelemowefuwaniniwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=tube+mate+app+free+download+for+pcPDF 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_off0000f0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A4 10812 bytes
SHA-256: ff6b19c37c72907ef1fac03ae6f9444de650f8543c5e62f92e16d799d2122c6f
font_01_sfnt_off00010966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10966 17308 bytes
SHA-256: 305605ff61db02c97f04f62d830cd8ff894565e076de27dde2ff41ee38fb9e27
font_02_sfnt_off000136a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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