Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc46e53786605231…

MALICIOUS

PDF

90.5 KB Created: 2021-07-13 16:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2aae6ef381309689df967262d226d3e7 SHA-1: df3f9acdcc45ca23e27d5229708abc73e1f6547f SHA-256: cc46e53786605231057ca1db230f941a585a8afcab6c1d293dda12ad2becb25c
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary purpose seems to be directing users to potentially malicious or SEO-manipulated content through a series of redirects and compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b88dad9a05---palijebu.pdf In PDF document text
    • https://kompaspt2.com/contents//files/xujizizuku.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/makadudiz.pdfIn PDF document text
    • http://jessicarossitto.com/clients/7/7c/7c16b8c799dae9ffcd1258f31d6ff645/File/225438113.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f763e6c2f---30702685398.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/87708871186.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/pujemamabiruwi.pdfIn PDF document text
    • http://lawyerstitleescrow.com/clients/9/9b/9b7cfcecb5e5abb6b877b2b1d59b4eb1/File/65487223054.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/015403326cea2c42619a2cad88295027/29994442218.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160af842c663e8---93769027339.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/kevafaravujagexibezabez.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdef0ad0c77---navimifominituxobawogi.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/34236152629.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/kurarikowof.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/jstll0vlguamhk8fjftv6m7mf5/kowikasalunaturojun.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607315a00cd26---lajagujamot.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/23878596598.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb17cef26f---87477149011.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/desag.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/0hucio541uqogodevkpt3p0frf/73940129529.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/97356883710.pdfIn PDF document text
    • https://smilepaper.tw/archive/upload/files/tixidodopikuwotatife.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/kujimikudizuke.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/rewutizasajulazivu.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/55987689423.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=ancient+druid+orderPDF 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_off00010233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10233 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4A 10068 bytes
SHA-256: a1daa7567802d88cb6fcec45f4e3626f8f6d7555c2587c4d7adb395f5469c910
font_02_sfnt_off000130d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D8 16952 bytes
SHA-256: f4c3cf39c390ceaad9f8c54c5b7e6e96f9279b74d4559cacea8e5b75c528dce5

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