Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22f95282ec6b40b…

MALICIOUS

PDF

78.1 KB Created: 2021-04-08 15:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 23798008e8abb967f09d775299b8f581 SHA-1: 291b1015b5701d37ea9daaec3bd4d382ccd9097f SHA-256: c22f95282ec6b40bda31257219b0df6c40116cc8dc61e0fd71696a49661189a7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/strik?utm_term=why+is+my+honda+rancher+leaking+gas PDF link annotation
    • http://fisujerekuvij.getenjoyment.net/nepedipugafujibikojiju.pdfIn PDF document text
    • http://keluzizizeroki.getenjoyment.net/muvitoz.pdfIn PDF document text
    • http://a1metromovers.com/zatomusenumijalap2e505.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461523/normal_6004b03194773.pdfIn PDF document text
    • https://cdn.sqhk.co/malofavu/CTicjiu/save_the_manuals_t_shirt_car_and_driver.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416666/normal_5fec7cc771f67.pdfIn PDF document text
    • http://biweekamnf.com/php_website_templates_with_admin_panel_free8w5jd.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/FBsijlj/55434913750.pdfIn PDF document text
    • http://zuzavepojul.mygamesonline.org/21183174241.pdfIn PDF document text
    • http://xuritepizib.mygamesonline.org/liquid_level_measurement_using_capacitive_transducer.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/22978969847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_602804e7d66eb.pdfIn PDF document text
    • http://lnstagramsupportlives.com/kogejezapigasin9mx8.pdfIn PDF document text
    • http://kino-vezde.ru/anatomy_directional_terms_practice_answer_keyrqq84.pdfIn PDF document text
    • http://qrettalq.online/how_to_adjust_the_float_switch_on_a_sump_pumpx3ayg.pdfIn PDF document text
    • http://wuxetij.mypressonline.com/robidujipavik.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/stock_market_crash_2008_daily_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/zesojesiwi/gUgh3NO/destiny_2_dmmerung_guide_spiel.pdfIn PDF document text
    • http://mibilivo.scienceontheweb.net/xasiga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474759/normal_5fd0404b7e2e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428083/normal_6066faf87bd3a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lumosaneja.onlinewebshop.net/42567377605.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_off0000f33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33B 5532 bytes
SHA-256: ab5c4a6f21201917041948e54459d5c999940496eaf155beae1ad14973534b9c
font_01_sfnt_off000105f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F2 10808 bytes
SHA-256: 50259c6c5e6d6b814461a8520400e77308b55ff62491ff78357edf779bb68031

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