Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1e58c44ab5dbfc…

MALICIOUS

PDF

72.2 KB Created: 2021-02-18 13:18:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 146a203b1e1fcbfe77ee48436e238e25 SHA-1: e6be23d0fd91ce88bc381639d399e38bc4665be9 SHA-256: 6c1e58c44ab5dbfc1c2031cc445b85dadaf22c3a16448c454794a485255d6163
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/wix?keyword=contract+killer+zombies+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4469375/normal_6025c45e3a160.pdfIn PDF document text
    • https://cdn.sqhk.co/wijugilom/wwieNc7/wix_sign_up_button.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473049/normal_5fe57b7874e6e.pdfIn PDF document text
    • http://arnautmebel.ru/blood_test_report_analysis1s6db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_60171130a6504.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471253/normal_5fdf5b9d027c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370317/normal_5fcfecf39de8c.pdfIn PDF document text
    • http://mxbur.fun/setivegawuye50.pdfIn PDF document text
    • http://redit.fun/lawimupibab9v6f6.pdfIn PDF document text
    • http://vehicleinsusa.com/jj_smith_green_smoothie_cleanse_recipe_day_16o7fh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452835/normal_602a88fbd9946.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369926/normal_60038039a6003.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/hidhf5w/39017918017.pdfIn PDF document text
    • http://winwites.space/zuzovojuwkykqs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454167/normal_5ff434617bea5.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/1hchiKo/whispers_of_a_machine_all_endings.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443823/normal_5fd920841634a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/nosixagi.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/7901032426.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/pokemon_cartoon_games.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_off0000dde6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE6 5236 bytes
SHA-256: 89c2d9993b46c52dda5980fdffa65e3281d7f12b204f14446dda0ef32d7276f8
font_01_sfnt_off0000efa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA4 10412 bytes
SHA-256: bcf0fd6051826da103f81682132ce8adcb4600542ac274b421cdb0ee25fb1672

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