Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e207062d75a0e1…

MALICIOUS

PDF

69.7 KB Created: 2021-02-24 15:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 65112f40e1093beef7f07b409234e469 SHA-1: 5b0e8eddf2757d8466175c1ff514c17788aaae30 SHA-256: 59e207062d75a0e193ce5d82cf0695b969b3ea48c63206ee6615f76bd5222c4b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable or unknown hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://jacksth.ru/wix?keyword=front+desk+training+manual PDF link annotation
    • http://bumasujofoj.getenjoyment.net/97490499446.pdfIn PDF document text
    • https://kufaxaza.weebly.com/uploads/1/3/2/6/132680799/davigorejisemagidi.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/1n8higi/fitoxatisagavasalike.pdfIn PDF document text
    • https://pupikitonusu.weebly.com/uploads/1/3/5/3/135301263/wizul-kuzawigurugew.pdfIn PDF document text
    • http://golixudib.mypressonline.com/how_much_is_a_soda_machine_worth.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/why_is_it_important_to_have_clear_goals.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/jhbicmm/39607057028.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/65147667065.pdfIn PDF document text
    • https://komamizidunip.weebly.com/uploads/1/3/1/4/131437982/zumiv.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/44003602038.pdfIn PDF document text
    • https://cdn.sqhk.co/dutedape/8Phhzja/pazefafufevalivajewevok.pdfIn PDF document text
    • https://cdn.sqhk.co/dixobiwi/WgikJIm/renamowose.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/lopadivupudexa/pugiwijijolesub.pdfIn PDF document text
    • http://rejefuwozumij.rf.gd/algebraic_geometry_and_statistical_learning_theory.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/holden_evening_prayer.pdfIn PDF document text
    • http://xoxuvenopojox.rf.gd/capsim_simulation_guide.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/rubutigogifijafenonuji.pdfIn PDF document text
    • http://wokeben.epizy.com/7780925560.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/social_media_calendar_template_printable.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/indian_historical_movies_imdb.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_off0000d425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD425 5164 bytes
SHA-256: c216d69419539933075b7a1c15c11dffeb2ca63968137c408ba7cd999405e2b7
font_01_sfnt_off0000e5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A7 10368 bytes
SHA-256: 5ab5e1baa940d381f0b29e4c3b6aafc7c520b98c7102a3f3c1c7f52e67bd4787

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