Malicious PDF — malware analysis report

Static analysis result for SHA-256 58575f5282ce5246…

MALICIOUS

PDF

77.9 KB Created: 2021-04-16 19:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 85222cb39a4797df8caba828a47beec3 SHA-1: f579207e03dda60031b4a4e2f68053149cd21d0c SHA-256: 58575f5282ce5246fa7a0859a68287b591064c6d916e82ae057404f578900f48
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, with a primary focus on a URL hosted on 'gimoguvi.ru'. This URL, along with others, suggests a phishing or malicious redirection attempt, likely to distribute further malware or conduct scams. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=d%2526d+dm+guide+free+pdf PDF link annotation
    • http://beviluxenumiliv.mywebcommunity.org/sony_wireless_headphones_mdr-rf985r_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/kanemili/jjXjahM/mermaid_secret_35_princess_ocean_warfare.pdfIn PDF document text
    • https://cdn.sqhk.co/lenalibuz/ic5iihh/11362374227.pdfIn PDF document text
    • https://cdn.sqhk.co/namemedoxake/cWQxuhe/60024313888.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_6011c705cbec5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478422/normal_5ffe737334b73.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/importance_of_english_in_multilingual_society.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/96a3f0d5-0ff4-4c61-aa77-433f86e54b9a/33019079167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3094f7-1c0c-4040-896b-104a72cca655/how_to_lift_weights_without_hurting_your_back.pdfIn PDF document text
    • http://sonarubitexo.atwebpages.com/xisunakidesepoxumule.pdfIn PDF document text
    • http://motojanafit.epizy.com/19983717785.pdfIn PDF document text
    • http://volisaberok.rf.gd/23054818487.pdfIn PDF document text
    • http://wavexijazibivat.myartsonline.com/alligations_and_mixtures.pdfIn PDF document text
    • http://bovubodomumid.epizy.com/teacher_interview_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13718504-93b2-4670-8550-41eb5b9435bd/windows_server_2012_r2_standard_oem_iso_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab6dcf32-01bb-4aa3-b6c8-fb66f54d55e0/15490988086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d312586-f9cf-49c7-96b5-4ea158de6234/how_to_calculate_posterior_probability.pdfIn PDF document text
    • http://xopabaw.epizy.com/kodifivawujokuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e0498b5-3c07-4e60-bcd6-854cc29972ab/girudowat.pdfIn PDF document text
    • http://nogafojomor.onlinewebshop.net/23178634723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9394981f-7064-4b13-852e-86c9f4724346/the_crown_season_3_episode_3_soundtrack.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_off0000e94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94C 4156 bytes
SHA-256: 5bcf7f318894cd8667f709bf970fa8c582a8027402ea75fdf14ac0e15260a4d2
font_01_sfnt_off0000f77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77A 18508 bytes
SHA-256: b9122b8bfb9ab2a9c16114afef50dc0df6519896cfacb44146a6e4ee548d8655

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