Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffeec369d3f692a7…

MALICIOUS

PDF

86.9 KB Created: 2021-09-18 06:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dd4067de8ed7003b1ee7b25d2cc6aec7 SHA-1: ca16d7b2c42a398658b7a0bffb705f656761106d SHA-256: ffeec369d3f692a761762e5f0dc647edf813f025c31085bfd26ebb4a2ac4f159
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to disposable domains, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were extracted, the PDF structure and numerous external links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://artechq8.com/beta/uploads/files/54619687687.pdf In PDF document text
    • http://lg-palette.com/upload/files/pinotalepefalowafubewa.pdfIn PDF document text
    • http://sireny.net/share/files/xikarewota.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021091402445910.pdfIn PDF document text
    • http://flexa.cz/docs/file/49972415831.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pufowijokasof.pdfIn PDF document text
    • http://goldmustang.com/files/files/63802319436.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/86730622018.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea2e1a45de---felomigulavajuv.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/32904671577.pdfIn PDF document text
    • http://celeb.huh.hu/UserFiles/File/28300305104.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/92391509382.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/384aa9102789c989a2851b21dbd2e595/terijekuwegaxutaxaten.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/wisivedamujuxigavol.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/36355905139.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/xufipuzegarabuxogixewop.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/72479158581.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/koguwolaxek.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/koxejemebi.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/jisuxelofito.pdfIn PDF document text
    • http://cudicio.it/images/file/gizikeseviwugola.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210903_AC8A1C3B059A81E9.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/99552887000.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/71281624662.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=game+balap+motor+androidPDF 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_off0000f16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16D 17436 bytes
SHA-256: 65aba130cc985e174b44b3637e964acbab5f324b6018ac9b17264ba068f38ce1
font_01_sfnt_off00011e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E37 10564 bytes
SHA-256: 5fc15d74ab30b7f38481ddd9b0eb912eb8d496a754360c36274dddcf6841f013
font_02_sfnt_off000135fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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