Malicious PDF — malware analysis report

Static analysis result for SHA-256 7963de66f27cf96d…

MALICIOUS

PDF

83.5 KB Created: 2021-04-25 01:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c3d23d328f7a272faca6da9d430f5f5f SHA-1: 2cc0c93f8f38f9acf0991016ca63320420d2e67d SHA-256: 7963de66f27cf96dba775d275c0eaf385b6e8c85e6837e1da1919d83472d274f
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs, such as 'https://lozipotod.ru/strik?utm_term=how+to+repair+danby+dehumidifier', are likely used to redirect users to malicious sites. No scripts were extracted, but the PDF structure and numerous external links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=how+to+repair+danby+dehumidifier PDF link annotation
    • https://rukinedofixod.weebly.com/uploads/1/3/4/3/134348838/mosujaralogo-mazivak-malir.pdfIn PDF document text
    • https://jutewalezozapon.weebly.com/uploads/1/3/4/0/134016751/rikezono.pdfIn PDF document text
    • https://kunisalopug.weebly.com/uploads/1/3/4/3/134315348/1661665.pdfIn PDF document text
    • https://zisugopijelides.weebly.com/uploads/1/3/1/4/131438068/kejetakati.pdfIn PDF document text
    • https://mapivabivex.weebly.com/uploads/1/3/0/7/130776319/gisezopunib_junusibelijopu_goduramad.pdfIn PDF document text
    • https://xatefokagakutil.weebly.com/uploads/1/3/4/1/134108848/vifisoxizutus_pexexiwuvo_sukomomamod.pdfIn PDF document text
    • https://fujazilumekopel.weebly.com/uploads/1/3/2/6/132681311/3c5a82f0.pdfIn PDF document text
    • http://mrshadow.net/99092224964w3kt.pdfIn PDF document text
    • https://cdn.sqhk.co/zopezepazedo/bhehi9E/vaz_2107_salon_tuning.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/algebra_equations_worksheet_grade_6e1nie.pdfIn PDF document text
    • http://lnstagramverifycentre.com/tiro_parabolico_ejercicios_resueltos_faciles09oec.pdfIn PDF document text
    • https://ketevifut.weebly.com/uploads/1/3/1/4/131453005/xivagukaxibe-rojuvovu.pdfIn PDF document text
    • http://likelid.xyz/86587058131vl0n9.pdfIn PDF document text
    • https://xadajosawot.weebly.com/uploads/1/3/1/6/131636584/midafaxewimorik_lejokidama_nexozuf_dalexoxaxoxazo.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/0ssjgN0/jovaverugedarife.pdfIn PDF document text
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/2932742.pdfIn PDF document text
    • https://bimomudunaxa.weebly.com/uploads/1/3/4/7/134757379/a28ed6d1770ba.pdfIn PDF document text
    • https://vubilidupetox.weebly.com/uploads/1/3/0/9/130970012/nojotuputopu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_0965d1f167524c6895ca2c610e51c69c.pdf?index=trueIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_2f372ff7cf45421597d3c2d35604130f.pdf?index=trueIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_abf53af91258433cb9253955927d3110.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC58 5248 bytes
SHA-256: bd9939b5cd2848d2b64badfce2ff780b9e7272c182e87e46b702285c59e5ee4f
font_01_sfnt_off00010e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E06 10772 bytes
SHA-256: fe518e1eee3780a66708bbd1366a459efc1e364746b1be6066f172b8e5c42423
font_02_sfnt_off000132c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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