Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e45385cbc8e6ae…

MALICIOUS

PDF

79.4 KB Created: 2021-09-09 15:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e05af9d418bb06c3892ed7696dbc0f4b SHA-1: cc44da6f875cd2801ea81bd1032e5faa2c64754b SHA-256: 93e45385cbc8e6ae2760786db7e6cc16325ad11e3102dc27add2ea95e3f8e980
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('pixomot.ru') and another to a link farm ('mbk-montage.nl'). The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=how+to+enable+recovery+mode+in+android PDF link annotation
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/gefitakawonurugoje.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/xenutovotuzi.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139377bd60cd---89624342946.pdfIn PDF document text
    • https://msiutilities.net/documents/45822608686.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/luxisazaxigaxe.pdfIn PDF document text
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/21508946022.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/53081356358.pdfIn PDF document text
    • https://pmms-online.com/assets/file/86665492208.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/43064631447.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/ziziruleva.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210909100325.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/6521b411da8a5a9f6bd157554e40e33f/dilujajenudimidup.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/minuj.pdfIn PDF document text
    • https://himalayanespresso.com/espresso_ckfinder/userfiles/files/zemedufarileredojaxelu.pdfIn PDF document text
    • http://fantacyhandicraft.com/userfiles/file/67325363370.pdfIn PDF document text
    • http://spharma.ua/files/file/ketix.pdfIn PDF document text
    • http://pyramidplaster.com/file_media/file_image/file/niperude.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/vopisonobizopafipidazow.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/nokasupisanapokewekobupo.pdfIn PDF document text
    • http://vektor28.ru/userfiles/file/57547561091.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/nevup.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/zenamijifowuvopolo.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/tawotafejakuwir.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_off0000d0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D0 17720 bytes
SHA-256: 6c1e4a0757342beb214fc7f37c9f5f5102ef84bd68503d9936fb65d3383ea141
font_01_sfnt_off0000fe95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AC 10760 bytes
SHA-256: 68b2dcbdfdc03752d3bd598dccd60de1b72401da0eab86bd95ac348f9d023a9f

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