Malicious PDF — malware analysis report

Static analysis result for SHA-256 edfcf105a4b5adbc…

MALICIOUS

PDF

89.1 KB Created: 2021-04-03 16:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: a29e1ed48df1600ff56ae26da2e9b2b4 SHA-1: 57df1231b6df1b0b76269da1ea92f7e2a0c67955 SHA-256: edfcf105a4b5adbcc55a9dad0e0fc105d5775f9975c3725be38f317dc7ababc8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/award?keyword=medusa+turritopsis+nutricula+pdf PDF link annotation
    • https://risibazizugati.weebly.com/uploads/1/3/4/7/134710005/fujaxefebegi_titeki_wepitetux_ludetegoji.pdfIn PDF document text
    • https://vugopese.weebly.com/uploads/1/3/0/7/130739154/7869309.pdfIn PDF document text
    • https://zupakikaxabu.weebly.com/uploads/1/3/1/3/131380404/abc90.pdfIn PDF document text
    • http://zoradiwa.iblogger.org/66634882731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491169/normal_5fd60c5ea0ee4.pdfIn PDF document text
    • http://bamiduvunaw.iblogger.org/jozulixovusugixetasakopa.pdfIn PDF document text
    • https://tedarotola.weebly.com/uploads/1/3/1/4/131482933/78028d60d8.pdfIn PDF document text
    • http://bupadakibagada.iblogger.org/bubovivowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456989/normal_604ceb1e98764.pdfIn PDF document text
    • https://rawafutaxudux.weebly.com/uploads/1/3/4/0/134041345/sosemim-sakorawuzejoni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_11f5091643d24066ac3305702924ee80.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/856ce1f7-64e2-4af6-bc39-abcf24fa33e3/23300118569.pdfIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_c6acc4f344154f44847048df7ad13532.pdf?index=trueIn PDF document text
    • http://powajokex.rf.gd/fudarizigumitulikofi.pdfIn PDF document text
    • http://tosodesuvivat.epizy.com/pulavuzofaluduni.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/how_to_answer_do_i_know_you_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/rutuxekubavipenakimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/309032e0-96d9-465b-acde-cc8f53c9a4da/netgear_powerline_xav5201_av500_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/ac_to_dc_converter_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/mozig.pdfIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_9fd9a5f9fd7048af845d0995483bf97f.pdf?index=trueIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_a08445bfb90b48589eee84acbd397276.pdf?index=trueIn PDF document text
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_14273cf547304cf3b7830e9a06eea775.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6D 3968 bytes
SHA-256: 6079ec5d284f17d64d409fb829a62241b3c39d5462c3e6f3fc5bb2424892ff25
font_01_sfnt_off00011986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11986 5156 bytes
SHA-256: 31dc49a2a13f1910ce4e5a487d00acc5baedefbccc91aac6e9c5d10869af5012
font_02_sfnt_off00012b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2B 13844 bytes
SHA-256: 69fe96f9ecea91cb8356aacd0f9774e13a32136cbd64b810a83efcc83837dcb3

Open this report in the interactive analyzer, or submit your own file for analysis.