Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f4754ad027a4d4…

MALICIOUS

PDF

84.0 KB Created: 2021-04-20 12:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 97671aea5c56c29d02d61ef92917bc65 SHA-1: ececb2358c0fc2bb6848746caed9f786081f7958 SHA-256: b4f4754ad027a4d41dfa653071281c877c67a053ddd97a400521166a99d75db6
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable hosting, and is flagged as a link farm. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=evening+primrose+oil+pregnancy+success+stories PDF link annotation
    • https://cdn.sqhk.co/dufelogaruf/gjgzgcS/loxewexotu.pdfIn PDF document text
    • http://larumutul.getenjoyment.net/que_es_el_assessment_center.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/hcthlSE/24285222524.pdfIn PDF document text
    • http://vipmanmarket.space/accu_chek_aviva_plus_control_solution2bfz0.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/jb3ZmDV/davasibavukebinefevo.pdfIn PDF document text
    • http://xigosilefonaboj.iblogger.org/sudaxobopekupaf.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/ridilobajevosevuza.pdfIn PDF document text
    • http://dlkmvkoenv.info/how_to_reset_belkin_router_dashboard_passwordvzqve.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/f262c9aa-9ca1-4a7b-b459-2584238d5c51/soccer_practice_for_10_year_olds_near_me.pdfIn PDF document text
    • http://rugefar.myartsonline.com/50634729505.pdfIn PDF document text
    • http://tijejawoporufil.epizy.com/the_little_match_girl_movie_1987_streaming.pdfIn PDF document text
    • http://talizojewebovob.rf.gd/move_pages_in_adobe_reader_xi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d54d4e1-9ca3-47e6-a5e0-31dc167d4af7/jabra_freeway_firmware_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53ab177-605a-43ae-bf59-1f0bde5b413b/89701104794.pdfIn PDF document text
    • http://lavususixufera.rf.gd/ikea_malm_low_bed_storage.pdfIn PDF document text
    • http://xubikonenagoli.epizy.com/83576802003.pdfIn PDF document text
    • http://xijuroluzuka.epizy.com/55067674931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d9df219-7f18-4c19-ab0d-adb39c266c72/bijufikugogevuxakodazos.pdfIn PDF document text
    • http://pasifowon.atwebpages.com/73195671258.pdfIn PDF document text
    • http://nodefojabotozij.rf.gd/best_fishing_guide_venice_la.pdfIn PDF document text
    • http://japamitafixe.myartsonline.com/davokule.pdfIn PDF document text
    • http://pavepopeb.epizy.com/56035725390.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_off0001082a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082A 5372 bytes
SHA-256: ff4fe92b36266e3aee7cda397a1dc21ee7e7cc039f628f86fe138276eb4bf35d
font_01_sfnt_off00011a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A74 11212 bytes
SHA-256: a72860e41237fee3aa0feb6d91a3ac1739343c1ae09ae01d2b121817056dd979

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