Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf2cd331a1318d5…

MALICIOUS

PDF

76.7 KB Created: 2021-03-11 06:23:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9c1bb9104df743a3ba9e40a2f0434ff6 SHA-1: d2e496e4ba96a31e76aede80e87be48f189d4489 SHA-256: 1cf2cd331a1318d521d9d8c038edc74bb40d887c1466c1ca18e9e9a96750f815
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable hosting and exhibiting characteristics of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/123?utm_term=jquery+ajax+form+serialize+example PDF link annotation
    • https://wuduzavuvavazi.weebly.com/uploads/1/3/4/6/134618101/7366695.pdfIn PDF document text
    • https://tuvopezape.weebly.com/uploads/1/3/4/7/134712323/2987568.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/tizifekalixuxexaxavau4a1.pdfIn PDF document text
    • http://fallofelin.online/87591220914x5fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489988/normal_5fe763bb5f424.pdfIn PDF document text
    • http://hrushch.space/5767453993440yaz.pdfIn PDF document text
    • http://lisuzigerob.mygamesonline.org/actual_faint_positive_blue_dye_test.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443619/normal_5fd064233f523.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/what_is_meant_by_human_development_report.pdfIn PDF document text
    • http://umdtheatre.ru/who_died_in_13_reasons_why_all_seasonsdij11.pdfIn PDF document text
    • http://jovasetiveduza.scienceontheweb.net/repogesoxikotabeburufuje.pdfIn PDF document text
    • https://bezesigut.weebly.com/uploads/1/3/2/6/132681157/5603405.pdfIn PDF document text
    • http://pawusewi.sportsontheweb.net/57603170525.pdfIn PDF document text
    • https://vufuredupe.weebly.com/uploads/1/3/0/7/130776381/2972954.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458407/normal_5fee115314998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_604633893c04c.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/kirby_vacuum_repair_memphis_tn.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/polexebuj/98630266822.pdfIn PDF document text
    • http://xafexepov.epizy.com/photosynthesis_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/como_funciona_reembolso_no_cartao_de_credito.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/what_is_an_anarchist.pdfIn PDF document text
    • http://mamisiz.rf.gd/board_minutes_template.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_off0000ea64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA64 5460 bytes
SHA-256: a0cf9ab44f84788be061d76d8b5be1920230303543b053d4126fa57a64fe1e14
font_01_sfnt_off0000fd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD04 12188 bytes
SHA-256: 00fd5fa02f4796f3811f261c975ec2e3cfad5f26835362d50b8851d6117c77e0

Open this report in the interactive analyzer, or submit your own file for analysis.