Malicious PDF — malware analysis report

Static analysis result for SHA-256 9889d14357c74ca8…

MALICIOUS

PDF

76.6 KB Created: 2021-03-08 06:17:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2c586b3c7e4848b07d5991b657392325 SHA-1: 4dddfdf395259b411103f717d6b725f8de24c459 SHA-256: 9889d14357c74ca8a15e4de63e7c2c89d0654c67d4bc2a096957794a34672bf0
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=health+informatics+books+free+download+pdf In PDF document text
    • https://cdn.sqhk.co/bofagenined/hTje0jj/muzigito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479942/normal_5fe7d10d8bad0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382953/normal_5feaf939c8ad2.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/gailfgj/super_street_fighter_4_arcade_edition_pc_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421471/normal_5fc7c82f38e90.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/how_do_i_make_lavender_simple_syrup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482847/normal_601ee90d85691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407810/normal_602b33b038142.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zobuwijezad.onlinewebshop.net/mabixoxavujifap.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/how_to_calculate_ww_freestyle_points_in_a_recipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d0202f2-df72-4bb9-b5ce-cb81326809c0/is_power_steering_fluid_leak_dangerous.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a507852d-89b4-474d-a024-c820001cafcc/95230391684.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/80819432335.pdfIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_e31ad3378f1944c19b885ef81001ab86.pdf?index=trueIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_63b4dcc0bbbc406b88e6018199f6e771.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b127a9-4a95-4d28-9877-bcd06c52b3c7/balzac_and_the_little_chinese_seamstress_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd280f3-2cd9-40c3-8436-6dba61272e2f/what_is_the_theme_of_the_book_the_outsiders.pdfIn PDF document text
    • http://wovuluvoju.onlinewebshop.net/what_does_high_blood_pressure_cause_heart_disease.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_off0000eda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA4 5652 bytes
SHA-256: cad71b3afcb174e1b0699f677ece06ac71d905774c5d5e7b4def5c5a8dbf644d
font_01_sfnt_off000100b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B9 10624 bytes
SHA-256: f9d73a08a5aaec59d2d770c750dd540c30526307915c92581d18934d13f34af3

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