Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0691c59018bef7c…

MALICIOUS

PDF

78.6 KB Created: 2021-03-22 17:36:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9fa62b537ebdfbd31b17ad1ed9b761e0 SHA-1: 2595fbf20c9532dbc87e4d393a140cdd09ce45c2 SHA-256: a0691c59018bef7c41f02ff55f80e747e19ccec0cb0043cdbc9dc8b1ed2d610e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or distribution network. The primary URL, 'https://baarspo.ru/strik?utm_term=why+is+training+in+high+altitudes+beneficial+to+athletes', is likely part of a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://baarspo.ru/strik?utm_term=why+is+training+in+high+altitudes+beneficial+to+athletes PDF link annotation
    • https://sojenakituvewo.weebly.com/uploads/1/3/3/9/133986345/fe862a9e48b59.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/fecc7eb.pdfIn PDF document text
    • https://cdn.sqhk.co/lixijadimit/haHpghs/medical_certificate_format_for_leave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_5fe6de6527c65.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/c0jhL4c/seruladawutibilataro.pdfIn PDF document text
    • https://menudapopejit.weebly.com/uploads/1/3/0/7/130775932/0bb083fe8c.pdfIn PDF document text
    • https://temeromaxuzi.weebly.com/uploads/1/3/4/7/134745627/2570616.pdfIn PDF document text
    • https://cdn.sqhk.co/budafitanu/ainzhfp/85053384681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452612/normal_60346e5956e20.pdfIn PDF document text
    • https://tesurupijirixu.weebly.com/uploads/1/3/0/8/130813669/112834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_603cb701de6f3.pdfIn PDF document text
    • https://fezuwarojeti.weebly.com/uploads/1/3/1/3/131383544/bobuxemogilojexa.pdfIn PDF document text
    • https://wimafepe.weebly.com/uploads/1/3/5/3/135326366/mofope.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajuwodaf/cgjCgc5/tower_keepers_gathering_storm.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/fajonubinomeder/master_of_orion_best_custom_race.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/xodepebowudusi.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/91775329467.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/70304020893.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/registration_page_template_html_css_free.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/96226034109.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/que_son_los_verbos_irregulares_en_ingles_y_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/sex_education_tv_series_season_1_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/tikoxefexujigurexavanepe.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_off0000f315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF315 5536 bytes
SHA-256: 9775d6088ba59d5bfd9d56b636dc1de512dddb515f07a2ccbdfaac21da964bf9
font_01_sfnt_off000105fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FA 11320 bytes
SHA-256: a3fe296867009696206c854769933b03ec904f7efe9c79a0fc51dcd1ce91b6d8

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