Malicious PDF — malware analysis report

Static analysis result for SHA-256 49521c77cd798cbc…

MALICIOUS

PDF

71.3 KB Created: 2021-02-10 13:16:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d4b002e3e8a51cee48d31d3faf44fe29 SHA-1: d6218211f08337e08e99962a49befa5f8bae4df9 SHA-256: 49521c77cd798cbc001f7e4b1148a9c748bab0b6f545f7190a0b7e0e74c0d581
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/wb?keyword=corrugated%20roofing%20sheets%20ireland PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496586/normal_5fe4d5aebaadf.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/AghheIz/sunekigorivexadevezuvipa.pdfIn PDF document text
    • http://sodobinefudiguw.iblogger.org/2._5_mm_to_gauge_sheet_metal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376875/normal_5fcbe82b7900e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418369/normal_5fcd638a08022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420599/normal_600fcda83581c.pdfIn PDF document text
    • https://fenatinuzari.weebly.com/uploads/1/3/5/3/135314561/gekadolapesepuna.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipufo/huK7ANb/how_to_draw_curly_hair_male_cartoon.pdfIn PDF document text
    • https://cdn.sqhk.co/rafumufo/iaxLjeY/defence_appropriations_bill_2019.pdfIn macro / runtime command snippet
    • http://pevetune.66ghz.com/analyste_kyc_formation.pdfIn macro / runtime command snippet
    • https://vumamoxaku.weebly.com/uploads/1/3/1/3/131380777/sibekogaxameg.pdfIn PDF document text
    • http://kenaxifinot.22web.org/fofedilamevivebirebus.pdfIn PDF document text
    • http://firstflirts.site/64567428570huzho.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/sinamozagemoger/57822438995.pdfIn PDF document text
    • http://foduwisidowej.rf.gd/pirogumofegozikizusug.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://foduwisidowej.rf.gd/pirogIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FC 5072 bytes
SHA-256: 5b0900d641b32244ec428f1f326eaf36233c4861c031097f121705fd81009ca9
font_01_sfnt_off0000ea38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 11260 bytes
SHA-256: edace27bfee52dc4fba4aded5bcc45da61b40db6611e32dd5c67ff59cfd4d8c8