Malicious PDF — malware analysis report

Static analysis result for SHA-256 abccf5cb7d486e9b…

MALICIOUS

PDF

75.0 KB Created: 2021-09-06 09:35:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8986573872ac19df3eb034a68511f794 SHA-1: c03a98659425065bc59bc351b846a1dd2340a1c5 SHA-256: abccf5cb7d486e9bff77f948afd9e45f1b063d47d42df7f7942f31d782f5c3d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/vfbq7cb9dpb5l9ka83jgha49jt/vuwiloxosojixaxotojudem.pdf In PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/lazibulividiripimesexivon.pdfIn PDF document text
    • http://giftboxvietthuy.com/upload/ck/files/21638604126.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/88976584135.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/88156819430.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/8k6k80u927l8j91ebkfoi5be11/19259734950.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca011546a7a---77968263994.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6a27de41d---92326764432.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/wilamomi.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/2829822118.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210628090005.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d00fb777bf3---wolexuvomupefos.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/5925770105.pdfIn PDF document text
    • http://usateatop.com/_upload/files/fonezarakaxoxoveniles.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/61487101778.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14e9b72dad---vaxat.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/u1aefokbf58ndd6chhho2lp4kt/siwuzuvizunegaso.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090201274073499.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d7cadce7a45---13432764754.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/28004403490.pdfIn PDF document text
    • http://simoncaulkin.com/images/51991920471.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/279583b7121d25ad2b62b71d22e67c9b/95894934976.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/12269881780.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=bass+mono+synth+manualPDF 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_off0000c21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21E 17628 bytes
SHA-256: 87e2ffc70e54dec60e0ab8c7ed7ab223e06bf12859b8fa743817f0df1177b2d8
font_01_sfnt_off0000ef66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001077d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077D 10316 bytes
SHA-256: 883b2821513acbbd55e1d2338525668b4f2617202b28ef97814f6bb1683f3877

Open this report in the interactive analyzer, or submit your own file for analysis.