Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e210ecd0f8b95c…

MALICIOUS

PDF

76.3 KB Created: 2021-09-05 04:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 12f2b2248d573b8262e60b49a3b62e27 SHA-1: 96239921857efddfbaf90a924ffaab31ab6dc329 SHA-256: e7e210ecd0f8b95c9cd1bfbc6339ef2554ef3497efae29830e33d4aec632f47d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate the document is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://infrive.ru/uplcv?utm_term=subproductos+de+la+industria+lactea+pdf PDF link annotation
    • http://tentauto23.ru/ckfinder/userfiles/files/32729116394.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d2134fcbe---8481656858.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/42128056824.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/77470366146.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/salutenajowotuvofin.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/0261ac3bdf393d9d5c99b49d8f640905/wazewaruzadarojemela.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/9a9c38d07c5b757b7c685a8b4ae715af/12199320187.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/397cddb1d3c51ab4f0addb92a2123a6a/63724643453.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/senuzopifisi.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/65375980298.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/79338241848.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/877314060.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/23081275516.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/26fd9fd100cf34ce88754c2d16c3d85f/kaneladujuve.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/mazebu.pdfIn PDF document text
    • http://schokobrunnen.com/idata/22628288003.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/43276451222.pdfIn PDF document text
    • http://sochistandart.com/ckfinder/userfiles/files/84251097014.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/60194059031.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe68cc367a---rozuzoranekakuzixojovab.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/37181276535.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/petukebefinepafufizafovof.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/45de9807ec021d9ad3840befad40b19d/47505813548.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_off0000c469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC469 10928 bytes
SHA-256: 20e32b81be5a095f421f05dd25f8fcc52fc3960dd51980c15c4e25c300ba7afd
font_01_sfnt_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 17532 bytes
SHA-256: 30d7c7457609e0e5db55ac66ba38358da9e038cf293026ab0b3199de21bc0b55
font_02_sfnt_off000109bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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