Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e34c477338ebc80…

MALICIOUS

PDF

76.7 KB Created: 2021-09-11 02:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 44a6ec8d0caa49203901b8ba7e29455c SHA-1: 0b3b8dd892e4db053d067c9e739ef28276864138 SHA-256: 9e34c477338ebc8058df9c690c048babde541aa12469eecf78f79521e5832733
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 pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags this behavior, indicating the PDF is designed to direct users to a large number of distinct, potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://blv.by/upload/editor/files/21458102914.pdf In PDF document text
    • http://crabandclaw.com/uploads/files/17103126761.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/duxowagulaxutorigaxow.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/28717567635.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/13676236522.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/galod.pdfIn PDF document text
    • http://mobitransjogja.com/files/60884990340.pdfIn PDF document text
    • http://gajagotour.com/UserFiles/file/68631375697.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/kewidogexun.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9a41bd80e---65480889672.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/86873178006.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/68617053196.pdfIn PDF document text
    • http://terrietanaka.com/library/files/46633288271.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/sidutepudomanajamakofi.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/86110639684.pdfIn PDF document text
    • https://yifff.se/userfiles/file/84697430327.pdfIn PDF document text
    • http://vet-spb.com/userfiles/file/67099348986.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/179109179761392bbe8fc9d.pdfIn PDF document text
    • http://moristas.com/userfiles/files/koxexejofo.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/52804379075.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/1983058961.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/75755335608.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/nagaworebulita.pdfIn PDF document text
    • https://fengshan-zhennangong.org/upload/ckfinder/files/76836794323.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/33998301760.pdfIn PDF document text
    • https://sleepthai.com/piceditor/file/vapugakifojezixukelofo.pdfIn PDF document text
    • http://irvine.songhakbbq.com/uploads/files/sonidenozuruxufofuzamanok.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1613631d92869d---59877272457.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+play+dual+audio+video+in+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_off0000c80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE021 17044 bytes
SHA-256: f5d14d71fb4b574ebfebaa6a4a751354c5a545750ed0a4cedc06f740885d0685
font_02_sfnt_off00010c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C45 10572 bytes
SHA-256: 58aafbc963918d5fbdd679d81c0266f30442e89e6ff6e15c6afd2e58a0c0bb86