Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc15b2479da4bc3…

MALICIOUS

PDF

68.6 KB Created: 2021-03-01 17:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 836e3587b7fbba7af41cd2e1b28b1f1b SHA-1: 2e805e0c77799806d567c315820df5f945c3786d SHA-256: 7dc15b2479da4bc3975292c7981b64efc802f27163afa81cc7d2f4b7d0f44da1
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=a+little+life+audiobook+free+download In PDF document text
    • http://premial.su/zopobakipinosafafeqdtp.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/95053314136.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5fcba554990ce.pdfIn PDF document text
    • http://nakanilo.club/how_to_write_a_visual_analysis_of_a_paintingrdz65.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/how_do_i_reset_the_schedule_on_my_pentair_intelliflo_pump.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478685/normal_6004be0f32571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445115/normal_5fd22cd8a91c5.pdfIn PDF document text
    • http://itdiscount.info/10533802903l6e8g.pdfIn PDF document text
    • http://originalhallyu.com/95913034155gn2n0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_602c88a094ca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383334/normal_6019a7c21e4b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_6029fb277c000.pdfIn PDF document text
    • http://mon-fortuneo.best/vifipesetozali7vmqz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461767/normal_600c8a414db0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kovaganobo.rf.gd/singer_tiny_serger_ts380a.pdfIn PDF document text
    • http://romesara.rf.gd/bundelkhand_university_phd_form.pdfIn PDF document text
    • http://xenivut.epizy.com/luxexeraz.pdfIn PDF document text
    • http://punafifa.rf.gd/heaven_cover_boyce_avenue.pdfIn PDF document text
    • http://dipibezepipes.rf.gd/barclays_credit_card_contact_information.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_off0000ce74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE74 5008 bytes
SHA-256: a52667d76a29b3a6cc93abdfd56fc02516d800177a8ebee94346ff07771b3577
font_01_sfnt_off0000dfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA4 10952 bytes
SHA-256: 01c1f90e895c744e957df8320a9fc0e5427a078e8bb58e211bd73cc14d61c845