Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b32ba86b4c00451…

MALICIOUS

PDF

105.5 KB Created: 2021-04-10 05:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c3a9eefca1f0a819690d5105800baf97 SHA-1: b1621d78ebe988ae19e9ffcd826a13d56deb4ef6 SHA-256: 6b32ba86b4c004519d48c23635507e92959ba3d52a6bd2b626e9647f4ca6315e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://druttle.ru/strik?utm_term=what+is+central+processing+in+psychology PDF link annotation
    • http://boevoenlp.com/relion_blood_pressure_cuff_error_3a09hu.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/nulepo_pazigu_jebatebob_lemuwewal.pdfIn PDF document text
    • https://dukozajaxal.weebly.com/uploads/1/3/4/0/134017298/62fd7aee88faa.pdfIn PDF document text
    • http://zafenoro.scienceontheweb.net/20471531545.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/66892576341.pdfIn PDF document text
    • http://praktika-ingenieur.com/jeribarunelixetuvagidisj43r.pdfIn PDF document text
    • http://vienvozvrat.site/skywalker_trampolines_square_sports_arena_15_trampoline_bluepin56.pdfIn PDF document text
    • http://arevakar-travel.com/english_grammar_book_class_3u5k8n.pdfIn PDF document text
    • http://hookup755.fun/aptransco_ae_notification_20201shjo.pdfIn PDF document text
    • https://burakizu.weebly.com/uploads/1/3/1/0/131070688/207958.pdfIn PDF document text
    • http://shoop-fl.ru/sogakurebuladafitawatodexp3a9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/8437644267.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/kerutojavedugep.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/village_survival_the_eight_season_1.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/high_level_architecture_template.pdfIn PDF document text
    • http://dipagepe.atwebpages.com/randomized_algorithms_tutorialspoint.pdfIn PDF document text
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_2f7df4ba0c614b95845f8ea0cdc6b7d0.pdf?index=trueIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_4de7173a1822434aaa83886b57802a03.pdf?index=trueIn PDF document text
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_d9e125881ae449a986b4c57ccc852026.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jozaponi/how_to_improve_3_month_old_sleep.pdfIn PDF document text
    • https://e924225a-aa46-4bfc-8e56-7341551e1833.filesusr.com/ugd/54dfea_e35df417e7e440fdac5370e6381e8e92.pdf?index=trueIn PDF document text
    • http://bipegokatif.onlinewebshop.net/vogel_s_approximation_method_problems.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F1E 5308 bytes
SHA-256: 7bfae6c02b628504756298c4f7e6b8c1bc136d686fac4ac2b6d5bce2f69ff30e
font_01_sfnt_off0001713c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1713C 11456 bytes
SHA-256: 971d09aba1557f60bf84558be0d8cfaccee6885b720c12e1ca672446db75990c

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