Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eed86f43d53b79e…

MALICIOUS

PDF

75.2 KB Created: 2021-09-01 09:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 57f500a7a7139616f9583386f1447e04 SHA-1: f9e222f4c1b969dedd9f1e8294977ca0d7e0915d SHA-256: 6eed86f43d53b79e7247cc6d0d4e1a22d980416cb76d66d278a3644304f40461
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The primary purpose appears to be directing users to potentially malicious content hosted on these external sites.

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://irlanc.ru/uplcv?utm_term=1+to+10+in+korean PDF link annotation
    • https://apz-arte.com/ckfinder/userfiles/files/2504628217.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/2842be52dc08460e370f442b8517066e/mavefegatexep.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a81ce70fd1a---visolulu.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/titulibexefowiv.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021052818013044.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/6876268142a58f5d53bc64b6e1d10fbc/popotedavob.pdfIn PDF document text
    • http://sharidyer.com/clients/863431/File/98462267171.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16096d85c0abe4---sekivawixinomuv.pdfIn PDF document text
    • http://jaatkinson.com/userimages/76811376398.pdfIn PDF document text
    • http://manajrgvaaradhi.com/cms-uploads/files/todonoxabi.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/2122331775.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/zefasabet.pdfIn PDF document text
    • http://sushi-belovo.ru/files/pireposidefakexorekate.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a333b41eca4---51640589336.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/6948515dbdb3ced0ab18014f8cf7315e/wesegipilevugen.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210630/file/16249938706885.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/7a55e0beb845ce5e3d5ec83ba22fa194/zitilewif.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/5551187642.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084df3e23b45.pdfIn PDF document text
    • http://tfforming.ru/d/files/juruwirijagerorepukisero.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/53693044374.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/8so4eovjbpj022o8juo9nl19iu/namuxesijakanexobos.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/31794470618.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_off0000bf7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD795 10056 bytes
SHA-256: 97bc9df14457d937ae59a2072ea16a557a6f7ac993884689c677aa15400ac851
font_02_sfnt_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 18996 bytes
SHA-256: e99e6913485b2267a57c4e6c5392a254d01fd46b135bf338c829979105d2e370

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