Malicious PDF — malware analysis report

Static analysis result for SHA-256 989b1ba693dfee20…

MALICIOUS

PDF

77.3 KB Created: 2021-06-08 19:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3ccc8ffe638b3ac62988b8dbf6ac7142 SHA-1: d14349d96ca5c9ec75ac3a48366ec9ce8dfe0b4f SHA-256: 989b1ba693dfee20e8e9986b5dc16b2dd5265447ef41fa8e33593af0758c78f1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary focus on directing users to a website related to 'free online slot machines'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/pbw?utm_term=free+online+slot+machines+888 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376625/normal_6057c8303a4b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460725/normal_6062af72709a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417995/normal_5fe7e03a18b36.pdfIn PDF document text
    • https://wojawuminusevob.weebly.com/uploads/1/3/4/6/134694879/0f40147302cae7f.pdfIn PDF document text
    • https://kuduxuke.weebly.com/uploads/1/3/5/3/135323303/nusomomir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411932/normal_5fe4ee91089e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472793/normal_60634feb9acb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469386/normal_601b80ce33d40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413109/normal_5ffc9b83bebb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461229/normal_5fe3302b0f25a.pdfIn PDF document text
    • https://govalusazun.weebly.com/uploads/1/3/5/3/135325024/8f7b66ba32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vadibun.pbworks.com/f/bosch_integrated_dishwasher_door_fitting_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce91155-7ee0-4377-a323-509c064d1959/18955585018.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/f/descargar_arbatel_de_magia_veterum_espaol.pdfIn PDF document text
    • http://bezawagiga.pbworks.com/w/file/fetch/144740565/is_athlean_x_good_reddit.pdfIn PDF document text
    • http://vifogajo.pbworks.com/w/file/fetch/144522342/1382497607.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/f/ninufezufureguxezijara.pdfIn PDF document text
    • http://kosumepifise.pbworks.com/f/a_court_of_thorns_and_roses_coloring_book_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bef3f62-2084-498e-a988-f9e9a12a47e1/49176622576.pdfIn PDF document text
    • http://gozuwef.pbworks.com/w/file/fetch/144662214/zafebefederikalowadutof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57bdf6ea-d585-4112-8a1c-bbbccf605a38/62025735277.pdfIn PDF document text
    • http://gijorugisaw.pbworks.com/w/file/fetch/144571677/crack_adobe_illustrator_cc_2019_reddit_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/646c88a0-e822-4316-85a3-a78dde70f854/best_books_for_9_year_olds_2019_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2556c9b5-78fe-4efa-95f1-531e0fa4b8a3/gifotoj.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF248 5188 bytes
SHA-256: f51396ab059197e13d79077df21f120f2d0ffd0b98296ade6845993678049414
font_01_sfnt_off000103bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BB 10520 bytes
SHA-256: 9bbcfbfe8bdbb4c39dd4f0812893381d0e1f92ced734350d43a799be0f272200