Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b3fe8d948e3cc3…

MALICIOUS

PDF

73.7 KB Created: 2021-03-30 08:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1cc7347cd0dda37d1c6dfb445e2296cc SHA-1: d624d298a0ef48cf9d8ffecb090ac5018f7c0f9e SHA-256: f6b3fe8d948e3cc3184378b9daf089aa6e681432c7a9eba2a23556c6e0e531b2
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and are likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The embedded URL 'https://mezovuduw.ru/strik?utm_term=draw+a+person+test+online' is the primary lure, suggesting a social engineering tactic to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/strik?utm_term=draw+a+person+test+online PDF link annotation
    • http://123dutch.com/wenurajizefezujozeluxit5fixh.pdfIn PDF document text
    • http://characduwe.space/forumituxawokutocngc9.pdfIn PDF document text
    • http://lovechat24.club/gojoxapilegofijo0pr5.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/QphjcuR/45879702761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453336/normal_604a688b5dd61.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/who_is_tyson_in_percy_jackson_sea_of_monsterskq46h.pdfIn PDF document text
    • https://cdn.sqhk.co/lakivasulis/je3jfpY/suppository_for_hemorrhoids_side_effects.pdfIn PDF document text
    • http://creditstar-kabinet.com/xagomat4j2pd.pdfIn PDF document text
    • http://megantv.site/what_does_a_dimension_in_brackets_mean0zepn.pdfIn PDF document text
    • http://copyrightsupporteds.com/puviwasifinilivefepirojup7id1.pdfIn PDF document text
    • https://cdn.sqhk.co/losomilodip/YhihhGd/fox_deportes_en_vivo_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501660/normal_5fc79d08deb90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d0c6d30-55b9-4b7f-8145-34d11b484ddf.filesusr.com/ugd/8db56d_1d5b4bbbd1874fd58ed611bc69ede51f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4267be6-803b-4a0e-ba82-ea697d1adac2/53190474185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb46164-a85f-4c95-87ac-8e3c67aef64f/58563717734.pdfIn PDF document text
    • https://d64d5b41-a66a-4b78-b87f-0feaf8e9cf76.filesusr.com/ugd/cf1aed_abdf46a5ecfe46d58da92f2e72e201fc.pdf?index=trueIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_321416ceafe04cebb35f25829f82404a.pdf?index=trueIn PDF document text
    • https://25cf7bc6-226b-4013-96fa-c64d334b7dac.filesusr.com/ugd/317e1a_e6c786853b1a4f398dbb87c4b3e7e07f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb2224b-7d19-4d1a-bdb0-52ba1687ecf6/33766799121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f00b4aee-28dc-4e71-b149-d72e4e60fec1/xelivekonapag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4148058-2e61-41b9-b58e-206dfcddfa2d/28646348399.pdfIn PDF document text
    • https://c93ae04b-3d95-4128-ac62-0503c91a26e1.filesusr.com/ugd/002f5e_eaeff6874d434c1983aef67c63c4ed3c.pdf?index=trueIn 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_off0000e52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52E 4904 bytes
SHA-256: feabfdb4047eda3ffcd803b06a21aba2083105788f961cde7319f62c00a43e0f
font_01_sfnt_off0000f5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FF 10596 bytes
SHA-256: fd5577295cff775679867dee6e444743ebaa4b36739897ad8c2046f143528828

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