Malicious PDF — malware analysis report

Static analysis result for SHA-256 114d2cfb6b5eac38…

MALICIOUS

PDF

74.4 KB Created: 2021-09-17 13:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6ef997b7591896f80b87cb6c7aca4c81 SHA-1: d4ecb427c1c6f6378656deabeecac0460b61a5cb SHA-256: 114d2cfb6b5eac38a2e36e8f3a4cbe69bebf8b067be0f1bef3974b1fc804520f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://lecourbe.dk/userfiles/file/zesuwifinijegivus.pdf In PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/lolakinovebud.pdfIn PDF document text
    • https://tanthueviet.vn/img_data/files/16465304850.pdfIn PDF document text
    • http://bluetact.com/ckfinder/userfiles/files/wewanovamofadapafodasapo.pdfIn PDF document text
    • http://sfalojistik.com/userfiles/file/71886757041.pdfIn PDF document text
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/gozeb.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/gotofunime.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/fagidapalale.pdfIn PDF document text
    • https://superpackeg.com/userfiles/file/gutarezifamexorexebupow.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/juserufadedilifipuligilo.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc1f577427---29497982859.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/zisegeviwadejutovokoz.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/34229526869.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/nowewotigigolaselovevexo.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/limogutalulowolisim.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210908063134.pdfIn PDF document text
    • http://kemnhapkhau.com/upload/files/21977074604.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/27584926407.pdfIn PDF document text
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/zexovomuvo.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/34269058707.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/33820572096.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/livuvivuxororibi.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/pafamusawixopubug.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/44141514817.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=fundamentals+of+physics+9th+pdfPDF 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_off0000bcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCBE 17528 bytes
SHA-256: 4768baf5f9a3023bc0ccd4b404dd69d6e9fedf1cd3f71d3218ffb36b753cef63
font_01_sfnt_off0000ea45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA45 11144 bytes
SHA-256: 180b5b40f78818ff8dee7e45f3513cc173128f8afd2492114588919c9ab81dcf
font_02_sfnt_off00010426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10426 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1