Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a0668b79ec189d…

MALICIOUS

PDF

90.7 KB Created: 2021-09-12 06:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8da00326713730a892f0a979d473c321 SHA-1: ea02bd7b55ec8ef7609cf650f106d3810fee941a SHA-256: f6a0668b79ec189d50ae8d2ade80d6ca8030992c0af2ad30ba938410142364c1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used for phishing or to host further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to obscure the true destination through a network of redirecting links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff03eb724a---83951240924.pdf In PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/rajoranirulebiwonur.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/98216539289.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/27278200865.pdfIn PDF document text
    • https://srilangkapools.com/contents/files/xazinibokuwamodapamafon.pdfIn PDF document text
    • http://ihanzao.com/userfiles/file/20210908164606_538095808.pdfIn PDF document text
    • https://datatalk.ilvzhou.com/upload/files/2021/09/202109082008419444.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/61335900614.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/27733001730.pdfIn PDF document text
    • http://www.klimavill.com/data/editorfile/waxufeveba.pdfIn PDF document text
    • http://gapp.fr/medias/files/92229493659.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/nojivafifelov.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/votubeti.pdfIn PDF document text
    • http://stagticket.com/fck_upload/file/zepob.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/9582015510.pdfIn PDF document text
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/pejaxikotomofevirisel.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/benafilenus.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/gividejarewaporivi.pdfIn PDF document text
    • http://photo-ostrov.com/ckfinder/userfiles/files/61264864947.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/75341047871.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/98405084654.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/kosejulebekojatox.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021090707520773499.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/49042812474.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=global+outbreak+mod+apkPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 16512 bytes
SHA-256: 0012f89962807b09eab0ba043623d757837ac89ef839e7cb2c261868f62da7c0
font_02_sfnt_off000102ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102ED 25700 bytes
SHA-256: a9a4622df18932531012435f46443e7ed49e0581bf162b5a2d4dbedb45e9db18
font_03_sfnt_off0001453f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1453F 10560 bytes
SHA-256: 3ec974e70c9056df353c2f76ea5a070e792b9cb1d1bb5a8c516c2642cb7c3f1d