Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6ee43d9469a66f…

MALICIOUS

PDF

75.8 KB Created: 2021-10-07 10:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: fd78e293ed263c361edbd05c9d65f739 SHA-1: da1b3d50cfa0bf48d142f85d58370008392bd8fc SHA-256: ca6ee43d9469a66f65d2995bbc793cbb20d477fb0b2b61076456363b4a47f473
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document functions as a link farm, presenting numerous URLs that likely lead to further malicious content or phishing pages. The presence of multiple external URIs and the link farm heuristic suggest an attempt to distribute malware or phish users under the guise of providing downloadable files.

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 https://wastran.ru/uplcv?utm_term=harry+potter+and+the+deathly+hallows+full+book+pdf+download PDF link annotation
    • https://kingdomdatesuae.com/userfiles/files/70687486015.pdfIn PDF document text
    • https://healthresearchinstitute.net/userfiles/file/76247425311.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16155c88647425---66876779793.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614755abc1d14---11634893047.pdfIn PDF document text
    • http://na3.it/misc/file/10989273150.pdfIn PDF document text
    • http://tangneylaw.com/admin/images/file/janotefavedej.pdfIn PDF document text
    • https://floridahouselottery.com/test/userfiles/file/badutekolivafiluxugil.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/tivelumi.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/77766812055.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/96741017392.pdfIn PDF document text
    • http://partnercable.com/files/dirasatiwopisuzamepatuvo.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/41348101608.pdfIn PDF document text
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/jutumovekekevov.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/fekezezisupugepa.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/57683879048.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/tizemezemufawo.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/99608493847.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/69136108702.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/55969319869.pdfIn PDF document text
    • https://aep-tc.com/cache/fck_files/file/24092847108.pdfIn PDF document text
    • http://reestr.fgosvo.ru/files/files/foratitimebomevepevaxel.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210903101935.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/noxiro.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/43328071224.pdfIn PDF document text
    • 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_off0000c4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF3 11028 bytes
SHA-256: df628d899e8175d90f681314e7a2043b64246083cda3b07c7cf0a0074202ac60
font_02_sfnt_off0000f65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65F 16492 bytes
SHA-256: 33670de3116d03d7119518367cfe23ea8b03370ff61a122cbadf91cf95e8a002