Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ebd6eeb0b0282c…

MALICIOUS

PDF

81.7 KB Created: 2021-10-18 13:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 90d52491d9f1729885bf0cd009be5d64 SHA-1: b052dc4545e65884447eb0f34bfe4a3730614668 SHA-256: 47ebd6eeb0b0282c8482c36ec7826eb44312e28b0a66db24c68ca869c37d9bee
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed for SEO poisoning or directing users to malicious content. The document body is heavily obfuscated and unreadable, providing no further context on its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crewmak.ru/uplcv?utm_term=adam+and+eve+campbell PDF link annotation
    • https://thietbixanh.net/uploads/files/kesulejanejufukoluju.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-10-6/20211006165902787464.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20211009132920158.pdfIn PDF document text
    • http://jobsmarttampabay.com/files/public/81228299708.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/59469647733.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/ps9c848lm06ahpefe6c4iamoel/71410481889.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/kepemogujunodixedajokol.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/97459575918.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/17487613317.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/lalisewaduvitaxefuxu.pdfIn PDF document text
    • https://propage.q-cloud.net/upload/ckeditor/pages/files/sewizogit.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/46s2kvcaqf6gs914n4602f9cr6/depojidaxete.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/zesexafazegulojefated.pdfIn PDF document text
    • https://accronline.com/userfiles/file/90106229836.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/jakuzi.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/87771291148.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/27557271696.pdfIn PDF document text
    • http://sapientgenerator.ru/files/userfiles/files/54790866843.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/siborodifatudoles.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/8s94r0tshhkjo7i40fobla8j9b/67177262610.pdfIn PDF document text
    • https://uslugiinzynierskie.com/eurostyl/photos/file/tamixadin.pdfIn PDF document text
    • http://tenis-klubmoj.si/uporabnik/file/gojajivezi.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/64604202667.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/46742120409.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_off0000db56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB56 10284 bytes
SHA-256: 1ed7da81eb6300337620b6ad34bb538f2567051d43047255e6dcb7de05633afd
font_01_sfnt_off0000f22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A40 17956 bytes
SHA-256: 5d614e256a4e2d6e796abbba84e5a1ee16f35f6d8f67c2608b64aa0f72eee916