Malicious PDF — malware analysis report

Static analysis result for SHA-256 b459f20daea416ed…

MALICIOUS

PDF

70.6 KB Created: 2021-02-12 17:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7e92ac0eb971221619d250a4589038da SHA-1: 5bdcf5e5d5afa928070139fbfff75c1257e2014a SHA-256: b459f20daea416edc2d9a6987bb9cc94bc5bbc1acc290e79267857950e15b46d
126 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
  • 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://jottigo.ru/wix?keyword=what+is+personal+connection+in+writing PDF link annotation
    • https://zozolesib.weebly.com/uploads/1/3/4/6/134631165/6023142.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383128/normal_5fcf8625376e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418185/normal_5fdda9a2e1bd4.pdfIn PDF document text
    • http://manthoughtswebsite.website/10611681435t8juj.pdfIn PDF document text
    • http://reduslim-italy.site/5633400292l4djk.pdfIn PDF document text
    • http://navaram.online/34608031885hznrd.pdfIn PDF document text
    • https://wawenefawopi.weebly.com/uploads/1/3/4/4/134494228/4de51.pdfIn PDF document text
    • http://study-english-04.space/trial_xtreme_4_bike_upgradesf0hio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487623/normal_6000eacb288ee.pdfIn PDF document text
    • http://heleogose.online/amgen_inc_email_formatf58gw.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/bnTihgg/74339558666.pdfIn PDF document text
    • http://appletopshop.ru/interview_questions_for_teacher_assistant_and_answershpk5t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414353/normal_6013d9114bb5c.pdfIn PDF document text
    • https://zamigalimigarub.weebly.com/uploads/1/3/5/3/135326483/jejujig.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/tojabixefova/walozudidisurukamixupuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/zumep.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/prime_and_composite_numbers_1-_100_worksheets.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_off0000d88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88C 5300 bytes
SHA-256: fa2d0dfec36086b64164a9cf190623aca627803d901ffe46a28d785658281bf7
font_01_sfnt_off0000eaa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA9 10132 bytes
SHA-256: bc4b24c55441a10b775eba91125b8634e70a393876f6f8f787983208af4e2180