Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab79b0730512904f…

MALICIOUS

PDF

78.9 KB Created: 2021-02-10 20:18:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3c5adf4888a98873663f5e13a38bded1 SHA-1: d8b27bdf17d625791325a7382c8983216c90a2e3 SHA-256: ab79b0730512904f010b0e67e1fefddb4b327a61a3e25c2f2e3b5d62a6ec745f
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://crophysi.ru/123?utm_term=white+specks+in+stool+during+pregnancy In PDF document text
    • http://buyervannakupitvsem.xyz/632008650371u0ss.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/V5jchaI/texas_war_of_independence_from_mexico.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/jgNgfCb/mikudinisasiga.pdfIn PDF document text
    • http://susurrus.space/midubupi5j33u.pdfIn PDF document text
    • http://masonufidowex.iblogger.org/90885074021.pdfIn PDF document text
    • https://pufedoxavode.weebly.com/uploads/1/3/4/6/134613169/ninupabaduxe.pdfIn PDF document text
    • http://rukozhop-guide.com/45578787719ajtpv.pdfIn PDF document text
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/fobelumewep_rolodo.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/fmxFJjh/sefasopowomuditodomuza.pdfIn PDF document text
    • https://fokuxadeji.weebly.com/uploads/1/3/4/5/134585395/2388646.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/Yn2gjja/farming_simulator_2015_argentina_mods.pdfIn PDF document text
    • http://reduslim-ordina.site/beethoven_piano_concerto_no_3tw0a1.pdfIn PDF document text
    • http://cryogen.me/zewakegunibm5akt.pdfIn PDF document text
    • http://milanbeach.fun/36641633705bi3ne.pdfIn PDF document text
    • https://wopixidotawus.weebly.com/uploads/1/3/4/5/134506387/parotej-nidulusida-zapefavekaxejol-wikotig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bunakakivukutus.epizy.com/chi_la_sow_movie_telugu.pdfIn PDF document text
    • http://bovinow.epizy.com/ccc_ka_full_form_kya_hota.pdfIn PDF document text
    • http://jikusona.rf.gd/girepojurijopaxuluzowan.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_off0000f695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF695 5512 bytes
SHA-256: 1555ecf2afa004348fa61831caac94758c6702dc8d07242457b14ddbaf0a47ef
font_01_sfnt_off00010960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10960 10868 bytes
SHA-256: 855c45659921f90b4a7a29a712f4a2d0924035b630c4695a151a9b8c3a932bb7