Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c367a46e3a5d7f…

MALICIOUS

PDF

97.1 KB Created: 2021-05-11 17:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7883fac0bf8c71c97f8475d9479ecc8d SHA-1: e1f4236d41950b538d38e17d840d42ad66887df4 SHA-256: 49c367a46e3a5d7fa0dd4881a9655636c95a1f780580e8185dbe3d757911a7a2
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to potentially harmful external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://boxijogirexu.medianewsonline.com/border_gateway_protocol_tutorial.pdf In PDF document text
    • https://cdn.sqhk.co/pibilebomek/dihh64p/lufodisubijutu.pdfIn PDF document text
    • http://zufoxemudasoso.iblogger.org/faragepuj.pdfIn PDF document text
    • https://cdn.sqhk.co/murajefovel/iigehg7/38231031540.pdfIn PDF document text
    • http://grizhoff.ru/deadline_to_object_to_expert_deposition_notice_californiabavy4.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/U9v5RAM/61368744753.pdfIn PDF document text
    • http://portkamesto.site/solapomezorakajodojozejigyb0dx.pdfIn PDF document text
    • http://shishkin-seed.xyz/is_ameritrade_better_than_robinhood8rvyp.pdfIn PDF document text
    • http://pochta-24.cc/daily_life_of_ancient_egyptian_priestsdhz5i.pdfIn PDF document text
    • http://viwafuxofiseko.getenjoyment.net/antrenmanlarla_geometri_2._kitap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/WboozbXZlIE/wb?keyword=export%20regression%20table%20r%20to%20latexPDF link annotation
    • https://3dd85f33-233b-4b3c-8e53-142bc8307eec.filesusr.com/ugd/8df890_a030eb4ba529494f956896756df081a0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/579a6c4f-3efb-49a4-9943-d9a6d6188065/el_principe_maquiavelo_resumen.pdfIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_6e1dd911ae2842a38e50a5b8d4971aec.pdf?index=trueIn PDF document text
    • https://b634734f-67aa-4edc-9b69-dcf7610e4690.filesusr.com/ugd/c86859_ce794b613aab4c9fb59a03ffdd2e2fd7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2973be2f-1214-4656-869a-75b0bd7c463f/emerald_tablets_of_thoth_complete.pdfIn PDF document text
    • http://nekedejiwaki.epizy.com/r_programming_learn_free.pdfIn PDF document text
    • http://rabelinowizufe.myartsonline.com/sibigov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/090f7e24-979b-49ae-89fe-155285b8e1f5/suxadopawelisot.pdfIn PDF document text
    • http://remobufu.rf.gd/ejemplos_de_informe_de_auditoria_sistemas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88ff6607-a0e9-449e-b7d6-2bc58146b6cb/2418053265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/950da1bd-34f1-4965-80b9-ab33c979452d/the_shape_of_things_to_come.pdfIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_c1e4d08b279d431e97e87d90f1682509.pdf?index=trueIn PDF document text
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_70acfd8403d5458db50345b40f38ea4b.pdf?index=trueIn PDF document text
    • http://tagitefidunun.epizy.com/hubspot_inbound_marketing_certification_exam_answers_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F06 4940 bytes
SHA-256: 530862d2f085ebab21b2634851045af8fd66051ca266aeb95ed78c6f2eeb68c3
font_01_sfnt_off00013fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE2 12072 bytes
SHA-256: 015a81b1bb6369ef7531ed032bb516c270f07e54713f947744b97b98a4438d6d
font_02_sfnt_off000168c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168C0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2