Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7b23aa97d610d4…

MALICIOUS

PDF

86.9 KB Created: 2021-08-01 00:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: f91e78c36f686920284ff96638dac773 SHA-1: 0dea2e833e86b98e5fea374ea9d0c55436fccc64 SHA-256: cd7b23aa97d610d4fa9c9563378bf07dcfa054872faf09e858ab382410b8cba2
156 Risk Score

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 http://hongdanhaudio.com/luutru/files/42649217445.pdf In PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/936i1k1csrm8664dbp2lk4dnu7/29383019068.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/o6h0ag4dtvq45hu2jphatgrkub/wunizodezedaseliju.pdfIn PDF document text
    • https://people11people.gr/uploads/File/digojegazonulukemimod.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6177aefe0a---7305546430.pdfIn PDF document text
    • http://vaikevai.com/ckfinder/userfiles/files/78041376325.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091283cc5790---kuxodoviwa.pdfIn PDF document text
    • http://cloverdiamond.com/file/kamopisuge.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/99483988207.pdfIn PDF document text
    • http://hotstamping.pl/files/file/53539226621.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/045e4b1348cbeaf11f1d0df55e775457/jifisebijutajadive.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160878c2ee6393---40897687580.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/karuvugafawipozu.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073d93e592d0---fafumupigivomezukafek.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/1d2055439baa9fbfb5f4d61dea126f7d/dofomigesasisitotikoruj.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/97228012513.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/941084355.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/muxudanawagonolomuzo.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/26839617053.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/2543cbfbdb0d9ba3a06de45f4fbc23b8/femavuxi.pdfIn PDF document text
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/gugate.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cab4c1373---27447712635.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/33247587667.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/7366ddaf32a2da83c280fa7249e11004/49445616018.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c39bec11844---foxuvalamejor.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160afbbed09cca---48278605737.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/51698591112.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=lenguaje+comun+y+lenguaje+algebraico+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_off0000eabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABC 18476 bytes
SHA-256: b5ce1a1848122bbb497d475a18b39f1619373830e0c044a12225a023ccac04e0
font_01_sfnt_off00011958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11958 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001316f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316F 11140 bytes
SHA-256: 51fbcbb06ca9bd8add7511b7470a07c779c317d2e8edc6cf9d2ef197a7d711d4