Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76675f9ce96924b…

MALICIOUS

PDF

77.7 KB Created: 2021-03-08 14:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 199812e8191675ff4502ac0846e81556 SHA-1: b206136ad3df75ed768a3556c6c378230683df63 SHA-256: c76675f9ce96924bd5217617d724b692ca4724c853e6863f927b923d76cc4cae
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 domains, and one specifically uses a UTM term suggesting a search result lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/strik?utm_term=how+do+i+turn+on+my+hunter+pro+c+sprinkler+system PDF link annotation
    • http://tidirakozodawon.getenjoyment.net/harcourt_spelling_practice_book_grade_5_answer_key.pdfIn PDF document text
    • http://phrensy.co/what_is_contemporary_australian_culturem2jje.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/ih1haee/4206946683.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/jbsjjij/big_business_from_my_dream_house_game.pdfIn PDF document text
    • http://reduslim-europa.site/are_stocks_worth_investing_in_redditgmq1x.pdfIn PDF document text
    • http://dsv-trening.ru/lujesodivifkkkk.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/how_to_reset_prius_maintenance.pdfIn PDF document text
    • http://yachts-4-sale.com/58796864728l5mfm.pdfIn PDF document text
    • http://wekeb.space/learn_math_fast_worksheets9gaa2.pdfIn PDF document text
    • http://hhizmet.com/fnaf_skins_for_minecraft_windows_10b032k.pdfIn PDF document text
    • http://discount50it.pro/what_are_the_cultural_effects_of_globalization5fhkf.pdfIn PDF document text
    • http://instapriz.online/important_quotes_from_the_crucible_act_1_with_page_numbers070da.pdfIn PDF document text
    • http://fabulouss.space/559048604176vu9b.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/gumetaxinabawidiz.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
    • https://s3.amazonaws.com/xedewofuretujo/peperun.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/zogekowipuzive.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/83573621037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d17f772-0faa-4bd5-9beb-6702d2235faa/jevupipo.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/24146913241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d7614c7-bc78-4734-bce8-2c0c4c58ea90/words_that_start_with_spl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26d2cc8-fe21-4ea8-aebb-23343fcfb81f/qual_o_melhor_horrio_para_se_tomar_magnsio.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/54282289699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1404098-7d8c-437c-8d4f-922561d1575d/presto_cooker_canner_number_7.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_off0000e583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE583 5204 bytes
SHA-256: e152e7d65deef06b71a55375218cf5ea259c1cd398a8f115565278471c1536ff
font_01_sfnt_off0000f71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71B 10412 bytes
SHA-256: 7974e0ef29df0be3a4a6d34685decbb282b99a9def02c3b075814c0feda16869
font_02_sfnt_off00011ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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