Malicious PDF — malware analysis report

Static analysis result for SHA-256 00cc1365bb92a622…

MALICIOUS

PDF

85.4 KB Created: 2021-09-12 03:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7408ea35ebadd6152de294c370bb0f33 SHA-1: 80562403c43e0b06e03122db859b6492f1f677a9 SHA-256: 00cc1365bb92a622e9acb8fb0b5a9856dcb4c001cb4c3a0b816d228b978f8f20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs and link farms pointing to potentially compromised websites, suggesting an intent to redirect users to malicious content. The presence of embedded JavaScript, although not fully analyzed due to obfuscation, further supports the malicious nature by likely facilitating the redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://smidgel.ru/uplcv?utm_term=samsung+galaxy+apps+store+apk PDF link annotation
    • https://nguyenthelong.net/userfiles/files/mexeruvowurimib.pdfIn PDF document text
    • http://news-hk.net/uploadfile/file///52456542381.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-09-03/fdcbc7be55d91573c62b893aac79f67f.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337cdc7eb53---49744717071.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lasuzonesuj.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/94181378400.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16133b9cab4845---20884149027.pdfIn PDF document text
    • http://szhlfz.net/upload/34893518038.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16131c968980c5---95240029746.pdfIn PDF document text
    • http://conditum.nl/userfiles/file/26926777388.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/b13315e70da36a94386ca776f835ba8f/92960300416.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/1c07b81f28d9e7ebb329250591d0ab58/11602881058.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/kuwatekikegipetiparedi.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/divosoxug.pdfIn PDF document text
    • https://rosycaffe.com/file/8749057483.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/jeduna.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210902031744_1097813116.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/43148980116.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/65298700781.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613525f269836---nanutadupaloroxogo.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134428e0ec04---92362752800.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/sagoxizesusizaxo.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/91707735379.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/sosirowogi.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/36894425252.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/48601867041.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_off0000e64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5F 18280 bytes
SHA-256: 2793b009f57e2d5c014833b9c5e5b7eca8076d26d45c745900b60ccf2b58908f
font_02_sfnt_off00012d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9A 10988 bytes
SHA-256: 0bed0a502fcae262efccbff9ababb7fb66328fa6b3547eac0c516c0644d5a04d

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