Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14c35efa6f98901…

MALICIOUS

PDF

70.2 KB Created: 2021-08-14 07:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 39ba6276cb008d853b62a8ddecaf8414 SHA-1: 0c13174c64892e856f354f24ae13c9e41dff3d9d SHA-256: e14c35efa6f9890158a1e114f2e5f0ef44401b07e5526037ad43abfa03101ffa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8521

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 http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da36813735---24886938214.pdf In PDF document text
    • http://shengnabei.com/uploadfile/file///2021061504501868.pdfIn PDF document text
    • http://northcity.rs/slike/files/lotojalolisabidilefujoxuw.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/afaaa44df55883cc9dfdbb9000ee9b8d/vejokegagu.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a02db1123b---40758326591.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/bipamijapituwikoziso.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc490d44e5---jafudogadolaripixule.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/bemafobotoremonad.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/52509794310.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/60951840220.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/borofofelukivawonabozet.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/mabufaralipozisifevojugux.pdfIn PDF document text
    • http://wshs67rocks.com/clients/9/94/942520bde836a0b401740df6f3d23d35/File/1427683702.pdfIn PDF document text
    • https://fajndoktor.cz/images/file/files/jebudipuzumaxitixujo.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/81232092195.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/diditujofobuxivijeg.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7644999e06---jaluxizeligivirupunop.pdfIn PDF document text
    • http://asclyziarskyklub.sk/userfiles/file/lewut.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/16126080722.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/2a855cd2f322cf472f3b838d7a4591e7/savejefazalovumifeluxaka.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/dcp5ullkf9245cv2uc3di85pv4/wetipenaluni.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/6jgedt0osavcn57q7706vtvifi/nizuwol.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/damokafop.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/xoliketado.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/be9bad12e031c9690f7ed0f680b29d6f/46195668880.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=jurnal+masalah+internasional+dalam+akuntansi+manajemenPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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