Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9a8424cc826cdb…

MALICIOUS

PDF

75.3 KB Created: 2021-03-24 10:05:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d6bb989eefae9367714d115ed0a22db SHA-1: 72713c81de99a50a8cc54112308d29393b1ee28b SHA-256: 2c9a8424cc826cdbcb958bfb2cf5c029e55d7958399a32e626f98386568f4bc1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, pointing to various PDF files hosted on different domains. This technique is often used to manipulate search engine results or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/award?keyword=comment+fusionner+des+pdf+foxit
    • https://cdn-cms.f-static.net/uploads/4459631/normal_60320ce9e59f8.pdf
    • https://fiwudarive.weebly.com/uploads/1/3/0/7/130775392/silalivuvi.pdf
    • https://cdn-cms.f-static.net/uploads/4479236/normal_5fe91b343292e.pdf
    • https://static.s123-cdn-static.com/uploads/4368758/normal_5fc62f34cf87e.pdf
    • http://sekodosara.22web.org/synonyms_and_antonyms_meaning_and_examples.pdf
    • https://cdn-cms.f-static.net/uploads/4448094/normal_600b613378bc4.pdf
    • http://dabedera.mygamesonline.org/wogunawokidoxuzej.pdf
    • https://static.s123-cdn-static.com/uploads/4382948/normal_5ff82b2e08775.pdf
    • https://cdn-cms.f-static.net/uploads/4484363/normal_6015b8915b613.pdf
    • http://vugekowuzujed.scienceontheweb.net/caravan_aptitude_test_book_2020_free_download.pdf
    • http://madawuboso.sportsontheweb.net/86733758333.pdf
    • http://nesebonuvobeju.getenjoyment.net/basics_of_chemistry.pdf
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/pebilon.pdf
    • https://fuxopejebema.weebly.com/uploads/1/3/4/0/134018858/153330.pdf
    • http://gudutisiluzew.mypressonline.com/marketing_materials_list.pdf
    • https://static.s123-cdn-static.com/uploads/4495550/normal_5ff363182de44.pdf
    • http://fojolosu.iblogger.org/chemistry_lab_report_cover_page_template.pdf
    • https://cdn-cms.f-static.net/uploads/4387054/normal_6058dd832292a.pdf
    • https://cdn-cms.f-static.net/uploads/4478688/normal_605247194747a.pdf
    • http://tufofol.medianewsonline.com/thallus_organisation_in_bryophytes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://womipir.rf.gd/como_hacer_un_almacigo_de_cafe.pdf
    • http://dexizijisub.atwebpages.com/lesagugimuwotegojuli.pdf
    • http://nekofixas.rf.gd/naliti.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e873.bin
87dd26970adbdd2fdb478baa312e839b833db3f94c92dc544c4ba7a0301c5553		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE873 4920 bytes
font_01_sfnt_off0000f91f.bin
0d1b85ff000672acaa40e4e2a8dc78cf7fc90a945b3c2689bb7294f98f477ae0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF91F 12024 bytes

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