Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2244323a876340…

MALICIOUS

PDF

79.1 KB Created: 2021-09-18 23:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 909b5706e9ee5766dddd968f7be83670 SHA-1: ecff610c7e4a60ab65f90fff265850a3c637a799 SHA-256: 6a2244323a87634053a7aadfc23e1d1241a39e25d1c8b83d87576c2540174ab5
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on compromised WordPress sites, indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs point to potentially compromised content delivery locations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613262b2abc2c---20185283342.pdf In PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613491f566ae2---rifiwowapepogewivirewexa.pdfIn PDF document text
    • https://dom4m.com/userfiles/files/18399437576.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/gojapimolujupukidelusofag.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/saduxom.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/wulenalawerolofagabo.pdfIn PDF document text
    • https://fengshan-zhennangong.org/upload/ckfinder/files/bawupi.pdfIn PDF document text
    • http://inkjetartandimage.com/Uploads/file/gogixesokupefivalubituvam.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/gopawoja.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/woralorozasawedip.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/pijubukojafiwezobikojaxi.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/duzebupimusavuv.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/57305471283.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/161366bd8d8e55---52342274707.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/70537013918.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/24059236591.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/vedukogabomejozijimaxir.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a72f2ef852---pavubegefujofokadep.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dusir.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/89013130267.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/mamujanexivevajikejop.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/ab10ca8adba0c85492b25ba2f8db42e9/xuzik.pdfIn PDF document text
    • http://nhadep30giay.com/uploads/image/files/didanikunutasokusina.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=bewakoofiyaan+full+movie+downloadPDF link annotation
    • 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_off0000ccd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD6 10660 bytes
SHA-256: bcefc459b0efd7ada270c0dd75de46106241512e93ad36d3c4dd9de99530c2f1
font_01_sfnt_off0000e54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD61 18540 bytes
SHA-256: ad3110d7b3493c15b92cf67e1d91045294cf30ceca9e1083a79541532265a735

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