Malicious PDF — malware analysis report

Static analysis result for SHA-256 d732d406d2809c12…

MALICIOUS

PDF

71.2 KB Created: 2021-02-26 01:22:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d1d8fd6ec7275ea295f41dc620591777 SHA-1: 62ae56628eaeca657cd9ac022cf303589cabe1f1 SHA-256: d732d406d2809c124883d49e28e93d1333ce387c5e38c5d8e779cbfb7c57e3f6
184 Risk Score

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
  • 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://crophysi.ru/award?keyword=dell+optiplex+9020+small+form+factor+i7 In PDF document text
    • http://optarfes.com/bigeminismo_ventricular_tratamientoro2eb.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/download_audacity_windows_mac_linux.pdfIn PDF document text
    • http://tidexozi.22web.org/how_to_install_udp_protocols_exist.pdfIn PDF document text
    • http://grizhoff.ru/adobe_photoshop_cs3_tutorialwxmt3.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/72767206836.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/aeLiigf/download_ace_academy_black_flight_mod_apk.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/17552727337.pdfIn PDF document text
    • https://cdn.sqhk.co/mowasikuso/S7AwVhc/dictionary_english_to_urdu_offline.pdfIn PDF document text
    • http://ryduslim.website/el_principio_del_placer_freudospa0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415769/normal_5fc99bda31265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415525/normal_6015d0935682c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495055/normal_6033d84b91d9a.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/jbNgefT/dajimoxelebaxelatakajod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426261/normal_6008e06037c24.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/xogijafojumijikivowepun7ozjh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vexabimumemig.atwebpages.com/best_political_philosophy_journals.pdfIn PDF document text
    • http://feselipalez.epizy.com/70161800709.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_off0000d804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD804 5736 bytes
SHA-256: bcad4bf7a8cc75c015410c9b1bb54fc6b8ed3f25649114423be64ce12dfa5313
font_01_sfnt_off0000eb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8D 10616 bytes
SHA-256: 33672779b8f61b8f6ef5312c1544c4e4fb68972fa0f6913166a69114665437f8