Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f9ae4efa21d24e…

MALICIOUS

PDF

70.1 KB Created: 2021-02-25 01:01:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 804b0c8fd1f513300f323b7070e5bc71 SHA-1: 5b817a8cbe2af806d969458315c76e072e5e60ae SHA-256: 39f9ae4efa21d24e4a7867bee564e670da36c7244484f56b797f9c55cb5cf808
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/wix?keyword=bissell+proheat+manual+25a3 In PDF document text
    • https://mebijanuwirat.weebly.com/uploads/1/3/4/0/134042853/6654473.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378404/normal_5fe517b31a040.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/RiRjcjd/22597397911.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491687/normal_5fe1b29abe8c7.pdfIn PDF document text
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/pedadukitekamurod.pdfIn PDF document text
    • https://vebajixumese.weebly.com/uploads/1/3/4/4/134483039/likevemowojo.pdfIn PDF document text
    • https://dawutika.weebly.com/uploads/1/3/1/4/131407504/ziwedonepo.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/chief_information_officer_roles5qjue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497372/normal_5fd92e30cb6e2.pdfIn PDF document text
    • http://natasisenexu.22web.org/53347113737.pdfIn PDF document text
    • http://euroshopme.site/badoo_live_apkt12gp.pdfIn PDF document text
    • http://wapuwesifatirok.iblogger.org/vofamiguzubober.pdfIn PDF document text
    • http://robolab.one/holt_physics_textbook_solutionsyw8no.pdfIn PDF document text
    • https://mefosenide.weebly.com/uploads/1/3/4/7/134715399/folarupob-boburik-lunebup.pdfIn PDF document text
    • http://udilische.club/sanofixovotivofufotowil5i70u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvozakini.epizy.com/kugafufakodatob.pdfIn PDF document text
    • http://sekizipax.rf.gd/lozaxodatewikafesubed.pdfIn PDF document text
    • http://banagegogidilad.rf.gd/how_to_reset_my_zte_pocket_wifi_password.pdfIn PDF document text
    • http://satonavuka.rf.gd/alcatel_one_touch_software_free.pdfIn PDF document text
    • http://dusekamalebe.rf.gd/height_limit_for_rides_at_movie_world.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_off0000d4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B7 5528 bytes
SHA-256: 88f1876b900bfb59eb33bacd364ecea3f91cb3dd8e5a2a23363c971eaa9fa543
font_01_sfnt_off0000e75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75D 10372 bytes
SHA-256: 2801b40451722c1ef215bc24f5ac703fed93c6347388fcaccc16a2c98a96039d