Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4b98627dfd3418…

MALICIOUS

PDF

72.3 KB Created: 2021-02-18 18:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c523b720e272ad539d74da59c32adb1f SHA-1: fa603f4d55f18012f431cdff750a73f9a40acb25 SHA-256: 5f4b98627dfd3418a2839edeb6aa35137031e98d9c4e8104995a8f50b666a7d1
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=nba+2k13+apk+paid+version PDF link annotation
    • https://cdn.sqhk.co/sebixodof/jeijjgL/77905867963.pdfIn PDF document text
    • https://rinuvimasajef.weebly.com/uploads/1/3/2/6/132695862/1851494.pdfIn PDF document text
    • http://samozanyat.info/693282296381hlho.pdfIn PDF document text
    • https://devaropig.weebly.com/uploads/1/3/4/6/134616199/nojesonatumogul.pdfIn PDF document text
    • https://kazenatujexisof.weebly.com/uploads/1/3/1/6/131637291/zuzap.pdfIn PDF document text
    • https://xupubiwe.weebly.com/uploads/1/3/4/3/134339906/loruzitafurire.pdfIn PDF document text
    • https://cdn.sqhk.co/godivago/hiCChfs/13146980920.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/mPFWFjd/magic_earth_navigation_maps_test.pdfIn PDF document text
    • https://pesawuzopedeg.weebly.com/uploads/1/3/5/3/135327269/zumofeb.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/vChhF7y/39595793429.pdfIn PDF document text
    • https://giximanuv.weebly.com/uploads/1/3/4/5/134526051/bumivobidel.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/ggiX5gf/88687944159.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/5752172.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/h9hi9if/42482739152.pdfIn PDF document text
    • https://vusuranozaxo.weebly.com/uploads/1/3/4/0/134012668/40d8679a4ddb.pdfIn PDF document text
    • https://pebabole.weebly.com/uploads/1/3/4/6/134698512/9849682.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/pomaxa/bioquimica_medica_baynes_4ta_edicion.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/niseko_japan_travel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/dujodexuwajemejewewo.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_off0000dd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD83 5500 bytes
SHA-256: aaa57e392c18940429411581523430921e92e95e51f5a817fb319b0a5d0865f2
font_01_sfnt_off0000f058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 10412 bytes
SHA-256: b60166c2bdccec9e47049cee56e553d12e4c45194d576998ccfdb1a88ebeeadb

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