Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6467f04d07487e3…

MALICIOUS

PDF

74.2 KB Created: 2021-02-09 16:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 00cb4d51acc68a553c46bb75e4a37515 SHA-1: 4a502fc6f5d3881f3a0dcbe97fa1a11bf959d304 SHA-256: d6467f04d07487e3f20a086577e1fe2e99c08e8135acff9f8f97318f3163f3a2
126 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded links indicate an attempt to redirect users to external sites, likely for credential harvesting or further malware delivery.

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://jacksth.ru/aws?utm_term=the+finest+hours+imdb+parents+guide PDF link annotation
    • http://good-production11.site/pilopodujix8rq33.pdfIn PDF document text
    • http://kinoogf.space/rumazirpwqbt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379855/normal_600a5daf631d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497093/normal_600fbeac99511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_6019190e08a99.pdfIn PDF document text
    • http://bowaveridageg.iblogger.org/certifier_conforme_synonymes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470222/normal_6001e9587c540.pdfIn PDF document text
    • http://prostotit.site/veruropifumunuteje0mfc.pdfIn PDF document text
    • http://brosbass.com/38645951214rzsr5.pdfIn PDF document text
    • http://kefojixesopu.66ghz.com/30196450200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_601a2cc7b2083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_600a4a47b19fa.pdfIn PDF document text
    • http://tvoeobrazovanie.fun/arabic_font_style_in_english5ceql.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369511/normal_6007321dde64a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kunasajijujaf.rf.gd/transform_coordinate_system_arcgis.pdfIn PDF document text
    • http://pebivinetovawu.epizy.com/bemosalulizasepuzafa.pdfIn PDF document text
    • http://vujipuxi.epizy.com/swot_matrix_template_xls.pdfIn PDF document text
    • http://duzavito.epizy.com/beard_style_app_android.pdfIn PDF document text
    • http://latarugumajovi.epizy.com/wafikazafesosazabe.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/nerilobumesepakonabo.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_off0000e2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EA 5512 bytes
SHA-256: 6e9c39c6725ea6eed68fa6110c4a47e0383e8b3e957104159c57a4eb342d7525
font_01_sfnt_off0000f577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF577 11192 bytes
SHA-256: 7a63778e6fe31021f35c35c972a4c7a5e3f8c98b66c8a9a2e336f8d805694411

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