Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc68bff69266742c…

MALICIOUS

PDF

66.8 KB Created: 2021-09-09 14:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 357e975265d337adea8e266de023390b SHA-1: 268e6a5105e8e7560302c06acdf909ba38f86c06 SHA-256: cc68bff69266742cd212f0846e8f1536639fd0e5e06923812e0aabbe1bcdaeb8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various domains, many of which are associated with compromised websites or disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The heuristic firings suggest this PDF acts as a link farm, likely to distribute phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5541

Heuristics 5

  • 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
  • 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://allytemp.ru/uplcv?utm_term=neamen+semiconductor+physics+and+devices+4th+edition+solutions+pdf PDF link annotation
    • http://medwin.kr/userData/board/file/27521108896.pdfIn PDF document text
    • http://kyochonbuenapark.iorderfoods.com/uploads/files/19713406818.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/kojoxanavujuf.pdfIn PDF document text
    • http://nujhimachal.in/img/uploads/files/13096340544.pdfIn PDF document text
    • http://mamitobe.ru/files/file/20868339515.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/bobegelubifakurevikaxofe.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/09/01/59535188617.pdfIn PDF document text
    • https://digireg.at/upload/64046089343.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613565a18daa1---98713260623.pdfIn PDF document text
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/gatamupasifefeno.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/66057101664.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161351e8551e59---nurotu.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/gepokumoxiwafilisukodew.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/kipodufimaxefelazusukobex.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/6832217211.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109081212332698.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/161301f2688573---45476763509.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/58505476411.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/mijaletom.pdfIn PDF document text
    • https://emenu.hu/editor_up/57056386464.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/mowipexaxafenegolopiza.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/95570114482.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/b72944f72b48f87087347b12d08b5c56/95032677722.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/99942281607.pdfIn PDF document text
    • https://kuepancong.com/contents/files/mijitotixalefovoxotuzi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC026 17280 bytes
SHA-256: c980cf02f7ac68253d745156459c697ae0e36bc6e52aeb43188e8d44639010e2
font_01_sfnt_off0000ecc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 11220 bytes
SHA-256: 91339e92abe4cf63392a0421a48313635d11f29a02e6c95fd659e3e482ab2e39

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