Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c016546b8c1e26…

MALICIOUS

PDF

63.2 KB Created: 2021-03-20 02:57:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d24f24fba39deb1086942583a876ee30 SHA-1: f28d4f6ed711a3e1696c82e9ab4dbeec7675dca9 SHA-256: 72c016546b8c1e26790d8927ab6085bbe020f0be8dec21232f687ffd1989c998
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting and acting as a link farm. The primary malicious URL identified is `https://dugedepap.ru/strik?utm_term=does+a+top+loading+washing+machine+have+a+filter`, which is likely used to redirect users to further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8600

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://dugedepap.ru/strik?utm_term=does+a+top+loading+washing+machine+have+a+filter PDF link annotation
    • https://susuwiwonilo.weebly.com/uploads/1/3/1/6/131606006/fobiburu_fuzezakekak_ravodikipe_romegilakegugem.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/52444171722.pdfIn PDF document text
    • https://selokifasafu.weebly.com/uploads/1/3/4/3/134383977/1fd1f.pdfIn PDF document text
    • http://ginupedarokuxu.getenjoyment.net/gogasezixogotaluvutek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376380/normal_5fc700ca52aab.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/ccna_cyber_ops_210_255.pdfIn PDF document text
    • https://zarimuxeve.weebly.com/uploads/1/3/4/8/134897304/9bfd71fa.pdfIn PDF document text
    • http://gusanod.22web.org/turululeperelizabedejep.pdfIn PDF document text
    • https://gisimezibeze.weebly.com/uploads/1/3/0/8/130874543/zodanitodiginul-zupizopekafoba-nifiwawemiraf.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/nozatamezon.pdfIn PDF document text
    • https://ropexosuwewi.weebly.com/uploads/1/3/1/3/131380205/rozuwogug.pdfIn PDF document text
    • https://ruxelasukosife.weebly.com/uploads/1/3/4/6/134667582/mejizinufesom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411682/normal_5feebecd60e46.pdfIn PDF document text
    • https://runanusug.weebly.com/uploads/1/3/5/3/135313332/fejox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuwutexo.onlinewebshop.net/pediatric_depression_questionnaire.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/libros_de_fisica_universitaria.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/how_to_determine_energy_efficiency.pdfIn PDF document text
    • http://lovafis.rf.gd/ignou_mca_solved_assignment_2019_free.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 5720 bytes
SHA-256: 05f5e6308208192f806b37ccf3f489e2e50d764c68e70d2f69c4c2de8ac6902a