Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da947151f60b72a…

MALICIOUS

PDF

93.0 KB Created: 2021-03-23 16:03:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db79ea68449c2520d6e75d98182b4272 SHA-1: 496de838396a9ecca707a3df5280497d9b567bbc SHA-256: 3da947151f60b72a2b0db3af7ba0bb57a84bcc3d68939bfa0b089e660047cd8c
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The embedded URLs are likely used to direct users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=ashab+e+kahf+location
    • https://cdn.sqhk.co/jigugabopu/Eicig2j/jekidimilizesavu.pdf
    • http://baliferifopiz.mypressonline.com/psychology_statistics_for_dummies.pdf
    • https://cdn.sqhk.co/pagifizipafo/diets4E/buxutukasikiged.pdf
    • http://bristol-yalta.run/mod_organizer_no_handler_foundnkhck.pdf
    • http://banquepopulaire-fr.org/mepavopaxiwonuzifoz57w9q.pdf
    • http://nupesupo.mypressonline.com/funibuxoke.pdf
    • http://zuxuvikewi.sportsontheweb.net/famadexovuguwodevuw.pdf
    • http://volosaty100.xyz/pdf_tuesdays_with_morrie9kpdg.pdf
    • https://static.s123-cdn-static.com/uploads/4454422/normal_5ff09085f33fe.pdf
    • https://cdn.sqhk.co/jirudumom/iijePii/tivulanubuperuvixosi.pdf
    • http://lubevos.scienceontheweb.net/rawub.pdf
    • https://cdn-cms.f-static.net/uploads/4407552/normal_60140597545a8.pdf
    • https://cdn.sqhk.co/zuxosutuku/jchcG6R/anonymous_face_mask_2_ply.pdf
    • https://cdn.sqhk.co/zadorari/ijN6dAI/tv_guide_usa_movies.pdf
    • https://cdn.sqhk.co/nakolore/iiicgiw/balupa.pdf
    • https://cdn-cms.f-static.net/uploads/4477164/normal_5fe65e4c46295.pdf
    • https://cdn.sqhk.co/gekakisoduvo/gipwiiz/renaissance_crossword_puzzle_answer_key.pdf
    • https://cdn.sqhk.co/wukikanas/fhgNha7/vokazemetusemifeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_9a2f7ac96ce348d7b7ace6f58663a9eb.pdf?index=true
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_df70f5420a184f05890516a06cfec468.pdf?index=true
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_811bd977e91340059e472c45ff342c1e.pdf?index=true
    • https://3789e5f8-265e-48cd-8836-241a044b7ceb.filesusr.com/ugd/45ef7e_551ed07ad1424d6683264176d0b285c2.pdf?index=true
    • 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_off0001310f.bin
da06e75b8dcaf5404f59b9a8a23814c805796eb4692655bb5d87d8b91d757a0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1310F 5068 bytes
font_01_sfnt_off00014253.bin
1886ed28374e8a89bbb77e40f1e58568ba4e7027d39721880d357683c3246acb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14253 10736 bytes

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