Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95482cdcf552495…

MALICIOUS

PDF

91.7 KB Created: 2021-03-18 16:16:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 0f7749ab784af24ef9947a376a5cdd9f SHA-1: 3bd65eeef145df2321ecde8f9f41b8ac87532a31 SHA-256: a95482cdcf552495c55327253824c619f55193b4909057b860061d553895999e
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=personajes+de+la+revolucion+mexicana+con+nombres In PDF document text
    • http://gisujug.mypressonline.com/34678819145.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/iigjihw/24553284770.pdfIn PDF document text
    • http://ruwufuwetoj.mygamesonline.org/linuzurijujatiradido.pdfIn PDF document text
    • https://sipebiwamedewor.weebly.com/uploads/1/3/4/7/134707389/3834042.pdfIn PDF document text
    • http://farvestnn.ru/fotesasorojurbcoc8.pdfIn PDF document text
    • https://vejarava.weebly.com/uploads/1/3/1/0/131070596/cb403ae9.pdfIn PDF document text
    • https://ragajepegoxi.weebly.com/uploads/1/3/1/3/131379061/8610467.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/Av7ljiU/wakolenaxu.pdfIn PDF document text
    • http://smartcreditus.info/is_nerve_suitable_for_10_year_oldsf4kjl.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/aieADib/vapok.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/5dab04e.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/part_time_night_shift_jobs_las_vegas.pdfIn PDF document text
    • https://manukigobedor.weebly.com/uploads/1/3/4/4/134481395/puvagawezuma.pdfIn PDF document text
    • https://xiriwedonup.weebly.com/uploads/1/3/4/2/134265341/dorukoteroni_wuxasor_jikiseraxekuna_xazopekapipoko.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/lamborghini_aventador_fiyat_2020_sahibinden.pdfIn PDF document text
    • http://paganel.world/53785391803jfdwm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kofepiropi.onlinewebshop.net/10_nautical_knots_to_mph.pdfIn PDF document text
    • http://zovogimobidel.rf.gd/kenulagoxokoga.pdfIn PDF document text
    • http://nutidefuga.rf.gd/61366664646.pdfIn PDF document text
    • http://tojawij.rf.gd/list_of_important_collective_nouns.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_off00011a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0C 5232 bytes
SHA-256: 5d316b14c9804cb48aba3308b9978b718df64ff4b099a26883944fe789df18ff
font_01_sfnt_off00012bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB5 11688 bytes
SHA-256: 35100fb7bb5d16c2505315f8a5be4033aa1cd88a053962a01062f19376e612dd
font_02_sfnt_off00015176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15176 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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