Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda9a56265420711…

MALICIOUS

PDF

130.9 KB Created: 2021-03-31 22:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c6d1e2b18a41f9c8e5d1c8477a141607 SHA-1: a42dfaf05fe0d665a52c7aa2dad11408b11136ca SHA-256: eda9a56265420711edf95e66ad93b872e31275af47ba8930bb64bf6f36681583
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to an educational summary, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://kuzutuzo.ru/strik?utm_term=schopenhauer+as+educator+summary PDF link annotation
    • http://wezutoxizuwal.22web.org/pofepirawowaz.pdfIn PDF document text
    • http://contact-git.top/86518770362c1vf6.pdfIn PDF document text
    • http://study-english-05.site/logunezeverapanegifufisc9qor.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/gaxemagisaxagadatuna.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/jobedixugodmdaoq.pdfIn PDF document text
    • http://kolomata.ru/a_que_edad_se_deben_bautizar_los_nios_segn_la_bibliaq58be.pdfIn PDF document text
    • http://malespw.xyz/the_lost_ways_book_hardcover1vjx6.pdfIn PDF document text
    • http://armlur.space/mysql_for_beginners_bookg0hc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/965f6604-b87b-4dec-bd88-42a3efdf9876/36740787358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/371fe418-4112-46aa-aa87-ed4a66f7903c/7th_grade_pearson_math_book_answer_key.pdfIn PDF document text
    • http://bogetezapore.rf.gd/6060333487.pdfIn PDF document text
    • http://vujesidewu.rf.gd/etcher_for_mac_free.pdfIn PDF document text
    • http://zexukojol.rf.gd/oedipus_tyrannus_themes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9166f8d9-4f5b-4e49-b6c4-3de68d456241/dyson_battery_pack_6_cell_type_b_dc44.pdfIn PDF document text
    • http://wedusumefixikeg.rf.gd/vavifagitega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6157daba-b551-409e-983b-7b83b8a4e794/mosowonifinadakimixor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/947ee5e8-eedc-4e61-abe7-2821faf25943/60601275137.pdfIn PDF document text
    • http://deribojuzirapa.rf.gd/my_electric_fireplace_remote_not_working.pdfIn PDF document text
    • http://zebusodevig.rf.gd/6402470520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d60893e-d689-42d3-803d-6319c2ad5923/how_to_take_out_xbox_360_disc_tray.pdfIn PDF document text
    • http://zexeborora.rf.gd/divergent_book_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/955aecc8-4ee5-4b9f-9623-0f154a853a6c/zumefadajawo.pdfIn PDF document text
    • http://remakisigepadi.rf.gd/detaxibujefamo.pdfIn PDF document text
    • http://resibifamopoto.rf.gd/28741397461.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_off0001c65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C65F 5484 bytes
SHA-256: c72fe04ec0e3c5abe3294a902678f25a03cb16c99cade6d7e227df9fb0762693
font_01_sfnt_off0001d8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D8E3 11256 bytes
SHA-256: ffd2659e93b49ce750d9cab06088ad4d497bf4aedc37877bb5c138b661546c11

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