Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa611e0865011fad…

MALICIOUS

PDF

76.6 KB Created: 2021-03-18 23:33:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e1b4fe2ca3f8cd4ec1033d7f8b6c6516 SHA-1: dab47bc1857e8fc66de3b4cc5e63e27297853c36 SHA-256: aa611e0865011fad784f1b6f9ee8d917095c3d8d365366a6d051f21b032fe09a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, with a primary one pointing to 'jumiwimov.ru', likely serving as a lure for phishing or malware distribution. The PDF structure and embedded links suggest it's designed to redirect users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/award?keyword=auction+theory+vijay+krishna+pdf PDF link annotation
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/rusukudu_mixubuj_leviwukaxuf.pdfIn PDF document text
    • http://gosejoligezo.iblogger.org/gajokuxologubuxal.pdfIn PDF document text
    • https://cdn.sqhk.co/roratumopiv/teQOhcn/28690729606.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/dNiaieX/droid_optimizer_latest_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dufimogemeka/whfcLji/1607594893.pdfIn PDF document text
    • http://salea.site/lopiloruropj37l.pdfIn PDF document text
    • https://kesegupopu.weebly.com/uploads/1/3/4/1/134131766/4744033.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/cf70Zji/tuxaxoxesarexulamanux.pdfIn PDF document text
    • http://mamontov-net.cc/paediatric_clinical_examinationvfbxl.pdfIn PDF document text
    • http://pasetbs.xyz/water_sniper_runess66tg.pdfIn PDF document text
    • http://goduvide.22web.org/blackboard_app_for_android.pdfIn PDF document text
    • http://shoes-storie.club/war_room_prayer_strategy_bookugm2t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jijetebum.epizy.com/toyota_corolla_verso_2003_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/zibakanutat.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/camera_raw_presets_v6_free.pdfIn PDF document text
    • http://pisubepajolosu.rf.gd/96912310313.pdfIn PDF document text
    • https://781b76d0-895c-4d4e-90f3-491762fad171.filesusr.com/ugd/894952_74e05d1e755243a4a0fbab0d616be52b.pdf?index=trueIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_31507640d75c4d309893c8f4a732af88.pdf?index=trueIn PDF document text
    • https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_9fc4e69e1123411eb356d244aab8303b.pdf?index=trueIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_e730a474eab144d39a2d637393f3f4cd.pdf?index=trueIn PDF document text
    • https://c2963e02-5f2a-49ff-bb4d-22715b80ab3a.filesusr.com/ugd/55efe4_a110a79d2ae3474385895c3dafa82ee9.pdf?index=trueIn PDF document text
    • http://pirefalanife.epizy.com/film_budget_template_xls.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/69776543024.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_off0000ed07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED07 5504 bytes
SHA-256: f6928a511cbffc91852e0c6c7e6f70853c2f6814fe2242ff3b90d8e302dc6a1c
font_01_sfnt_off0000ffd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD3 10932 bytes
SHA-256: 7c68c929ae939912d6806b1f821441e20aee5129eff8787a6dc84221ad198a42

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