Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2a6f7cd853fc99…

MALICIOUS

PDF

119.0 KB Created: 2021-03-31 23:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 10605132298b665ea5da316e80621722 SHA-1: df5b8043448c3c149c65dda565737ad91d88ba97 SHA-256: ea2a6f7cd853fc999eb1e55913a937ad72729b8988108f17fd83d7edf660d02b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'soxebez.ru', which is likely used to host a phishing page or download further malicious content. The document body, though heavily obfuscated, contains fragments suggesting it is a lure, and the presence of embedded URIs supports a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=the+americans+with+disabilities+act+is+an+example+of PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451750/normal_601547dacaf7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482018/normal_60097b1207261.pdfIn PDF document text
    • http://naturebiolog.fun/79605963811szz87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495985/normal_604ce0c876e13.pdfIn PDF document text
    • http://magnitoli-2ekran.site/846191237136cj8p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_60242cc09ec65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408335/normal_606388368e3b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420014/normal_5ff6779d097bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5fe924f1d68fb.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/d230587f-696d-40a8-98ff-e5d55d599d07/vusuzabupatomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2023403a-b178-4e90-9945-045aeae75194/gukojoruzuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67dc9503-d7f7-42d7-b121-43e990cc171b/strikemaster_mag_2000_ice_auger_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/aggiornamenti_automatici_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/how_to_calculate_ip_and_subnet_mask.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa3cb313-98c6-431a-b350-47302d5bec58/learn_python_programming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baec9b2b-93dd-401e-9399-b1ceb4723fb8/how_to_unlock_iphone_5s_tracfone_for_free.pdfIn PDF document text
    • http://wejifofodig.rf.gd/autocad_drawing_tutorial_for_beginners.pdfIn PDF document text
    • http://siximinifiji.rf.gd/job_hunting_skills.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_off000191f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191F5 5644 bytes
SHA-256: ac69960bf2d510849129a12f2dbf5d63e896aa33f20a78607440e4a088bd83be
font_01_sfnt_off0001a509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A509 11680 bytes
SHA-256: d93a94831b516ce0b81e5bba017a989e5f315577f75bae0ee3346ecb1d310cab

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