Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ecede07ce14787…

MALICIOUS

PDF

91.9 KB Created: 2021-09-02 16:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 04a169d62e5b420f76bb836bf8f8e57c SHA-1: 1e9f3af0f771c91f0a360a76958d09a8b8b9cf68 SHA-256: 34ecede07ce1478733d881c6c4f6f690b6167c08c6319ac470b95cbb40befbeb
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded links indicate an attempt to redirect users to malicious content, likely exploiting a vulnerability within the PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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 https://smidgel.ru/uplcv?utm_term=effect+of+social+media+pdf PDF link annotation
    • https://securityguardsupply.org/php/uploads/file/rulakeniwaruzen.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/purufakupuzebas.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f06a5764c3---lamitesozujibut.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/zolewijokolape.pdfIn PDF document text
    • http://twtime.com/uploads//files/202108072214425330.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/53126584163.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/fugewefofefir.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210628024133.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16081082663115---tugugekomudawa.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e24ab573835---toduwibanuje.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/xofobuk.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/dotodopubusovona.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/csmen8tvpeero3quplv7tkkot1/dokoz.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/bce52fe163133304d07d3c9e9714e526/jebavurir.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/4ae4fd587d894baf3ace3b4941f59616/lebofefed.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/6585379824.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/t227e2qtvdhsbovqdot4s8i4n6/wikiximizumotavu.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/lupaxirifamonesagowem.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/39367547054.pdfIn PDF document text
    • http://jar-ted.pl/file/gexakomarozanaziguriwo.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a08a278b020---32547447676.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/3171661287.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612baf728de21---90100970891.pdfIn PDF document text
    • http://maplewoodmachine.com/clients/1/17/17f0ea2532424b9b8bf99baf53cd3763/File/pokaj.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11b09a88be---67898788898.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b1cdff1a20c---rotadutofekofem.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/414b3d6a14b0b510b6355e361bc54504/21716627626.pdfIn PDF document text
    • 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_off00010422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10422 17372 bytes
SHA-256: fbfddc5b74adc9d246de3a81ee2378b1ec1174c188d9f81254ad22f21dc1e498
font_01_sfnt_off00013172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13172 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14989 10560 bytes
SHA-256: 664b1ecc60fcfec7f2dc98f88e0a577e668c0ab09497fa08897958b9dcb3dfc7

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