Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5cad5dc0a7fb0ab…

MALICIOUS

PDF

73.6 KB Created: 2021-03-11 06:13:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ae0997732c2154f4a8d33e110f92dcb8 SHA-1: 143ceda388abdfc7adb20bc8310385fd751203da SHA-256: f5cad5dc0a7fb0ab27ad0f796fee8ff7848aec34c41319bf87037b874fb8bfd6
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on 'https://soxebez.ru/award?keyword=catalogo+suvinil+pdf'. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to obscure the true malicious destination by using numerous disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/award?keyword=catalogo+suvinil+pdf PDF link annotation
    • http://youla-24.cc/stick_tennis_tour_mod_apk_downloadu972p.pdfIn PDF document text
    • http://rebezun.mygamesonline.org/how_to_use_a_ti-30x_iis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450148/normal_60172a5617d74.pdfIn PDF document text
    • http://womakojufute.22web.org/89370811665.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407552/normal_5fc84262a0723.pdfIn PDF document text
    • http://axacheat4.xyz/what_is_google_search_url_addressdq6gr.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/best_ajax_tutorial_for_beginners.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376856/normal_5fcbe2ae60484.pdfIn PDF document text
    • http://keysecret.ru/define_personal_knowledge_tok8s1a9.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/gabov.pdfIn PDF document text
    • http://businessmentality.com/7880392841r2vef.pdfIn PDF document text
    • http://fallofelin.online/bugezugudutepenimigixoni95qsy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_c9c1a6aec0f84e1488e283ef9a82e10a.pdf?index=trueIn PDF document text
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_ccf3aa7778f049a6b9eb1df49edad1fc.pdf?index=trueIn PDF document text
    • http://sigisifosa.rf.gd/romeo_juliet_tamil_movie_songs_lyrics.pdfIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_b55dfabcd0ca43ffa26a188dab6bdda1.pdf?index=trueIn PDF document text
    • http://dulibunaxojomo.rf.gd/video_orkes_om_adella_terbaru.pdfIn PDF document text
    • http://jajojamoxarug.epizy.com/4342356768.pdfIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_dd8b3e50edff4e6b8936afdfdbddb17f.pdf?index=trueIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_ff9378b2d51b474d9c8029f131a5b48e.pdf?index=trueIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_05588dabd45a4362baa5653505b9eb3c.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_f3b521c8659543eba6e46b0cdb579385.pdf?index=trueIn PDF document text
    • http://situgew.epizy.com/41464637746.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_off0000e3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BC 5076 bytes
SHA-256: a80353b233183cc9e55fb0c5f337cee1c7b36bf267557609346db799ecb91147
font_01_sfnt_off0000f521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF521 10652 bytes
SHA-256: de2cb8a30f7b103a481e9af46547386e7b015f5d6781796f2bc22b625b1a7e22

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