Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ea233d3ba17cee…

MALICIOUS

PDF

76.4 KB Created: 2021-03-11 08:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 546f8576fbfa76970b984c38106a269e SHA-1: c8b2a1dc5b36fe437ce41f80922dd71381b34e1f SHA-256: 66ea233d3ba17cee642504eace5c672ec73ec6ab658456d15dd5de39aa37277b
126 Risk Score

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 numerous embedded URLs, with a primary suspicious URL pointing to 'pelibifir.ru'. The document body, though heavily obfuscated, suggests a lure related to a 'manual', aligning with common phishing tactics. No scripts were extracted, but the presence of multiple external links indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/wix?keyword=ge+gdf520pgjww+manual PDF link annotation
    • http://sunugukumota.getenjoyment.net/95239297165.pdfIn PDF document text
    • http://fosavaxenu.mypressonline.com/ovids_metamorphoses_translation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465274/normal_6041c67f5777e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451220/normal_60446d508a28e.pdfIn PDF document text
    • http://fewudutizoxom.medianewsonline.com/50289216278.pdfIn PDF document text
    • http://xolululumaw.iblogger.org/el_sistema_endocrino_esta_formado_por_unos_organos_denominados.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/final_fantasy_vii_remake_ps5_60fps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447447/normal_5fd1e6029d753.pdfIn PDF document text
    • http://geniputan.66ghz.com/fbi_dance_crew.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/48608b13-6ae5-4fa1-b9d8-756875284f41/ferozarano.pdfIn PDF document text
    • http://nunavaxukozu.onlinewebshop.net/blogging_for_dummies_6th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d86e94ad-f03d-4e6e-bfc8-34ce994b449a/judith_butler_performative_acts_and_gender_constitution_summary.pdfIn PDF document text
    • http://wepaxilex.epizy.com/acnl_hair_guide_girl.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/benanama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0751c92-7014-489f-b962-0ffeec33d5f7/48134229971.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/how_to_connect_hopper_remote_to_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/nefava.pdfIn PDF document text
    • http://zugumez.rf.gd/91669478619.pdfIn PDF document text
    • http://dixuzudes.epizy.com/financial_reporting_meaning_in_telugu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE343 5684 bytes
SHA-256: 84da18eae403f3a22f114771d61c362b11aa6e3a8544c7e9bab767ea557babf9
font_01_sfnt_off0000f6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B2 2088 bytes
SHA-256: dbb6f8d97d4e4db63ebd71332726a0fc0a61c0ee2b1292864e9f427eab748415
font_02_sfnt_off0000ffca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCA 10660 bytes
SHA-256: 29bb7a83191b7ce7bdc8e4a2a52677baa51d823551741041e1d20ee1504b4ab9

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