Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade9053bb9bbfb81…

MALICIOUS

PDF

85.2 KB Created: 2021-05-11 16:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7218a93e97e71ec9e804980bea76d5cd SHA-1: c82db758606cbb959fca0727db5ed882e985c4fb SHA-256: ade9053bb9bbfb812bca3b0903e13f64338ef3cf0660653a71af3b7f4dc92219
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary suspicious URL pointing to 'xezojetit.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/strik?utm_term=ryobi+leaf+blower+40v+battery PDF link annotation
    • http://scoretdho.best/gijofowonulukowadono3isse.pdfIn PDF document text
    • http://volosaty100.xyz/subway_surfers_game_online_play_free_nowliemc.pdfIn PDF document text
    • http://pubgmobiie.com/bojojudazadupedepewa34r.pdfIn PDF document text
    • http://trysucre.pro/seguvexamolaferapamenih6ae.pdfIn PDF document text
    • http://discount50.pro/salegemaruxulafonod5lvv.pdfIn PDF document text
    • http://eagleaff.com/27968609944tqgaq.pdfIn PDF document text
    • http://vclean-sale.shop/fitemo0pmfx.pdfIn PDF document text
    • http://damvglaz1.xyz/que_es_liderazgo_organizacionalj0knb.pdfIn PDF document text
    • http://detonic-ro.website/mewed_noun_synonymvchr8.pdfIn PDF document text
    • http://storeyou.store/bifafananesegukikosodakital52b.pdfIn PDF document text
    • http://p-kavkaza.ru/award_winning_poetry_books_for_young_adults2qx01.pdfIn PDF document text
    • http://probmaka.tech/88481796591jdijo.pdfIn PDF document text
    • http://bestunew.xyz/ciudad_de_las_bestias_capitulo_4s3xtx.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/8806dd10-fd5d-48f2-a0ba-f3b11cb84317/sokotulabunotusaduvosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5d7e173-60cb-4c96-a3c4-ba8508ded23c/60219814914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8962792-6cce-42dd-ba07-414b44fb5941/hp_deskjet_3050a_j611_scanner_not_working_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85112df-8297-4860-9d77-4d54753d3bb1/guxivuguxemoxuwajux.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/bewibilubevobuzag.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/smart_tv_on_android_box.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/pokemon_sword_and_shield_guide_book_best_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b852f62a-6808-45ac-9418-97ad8f75c08d/57383599719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3045a6b9-7676-4512-9538-0a7481e45367/wovovepakuminon.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/61978379825.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_off0001106d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106D 5216 bytes
SHA-256: f98543088a96da38dcfea6c2d7d32d045fd6abcc0c1d3b555a0f46612174bc11
font_01_sfnt_off00012265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12265 10936 bytes
SHA-256: 898222f458ef4cc79731c479eb6c99212d4fec8a7fc33473c0442ce7a9fcc7aa

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