Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ba72d392f7ded3…

MALICIOUS

PDF

73.6 KB Created: 2021-05-16 18:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: bca07d88887c154bc2afca5d2b29670f SHA-1: 2a34061c59ea147ef47f4ba438e2641e39b99196 SHA-256: b2ba72d392f7ded3254f6400d7f95400a9b11f092ea2e0a41e33184ce0c45bae
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to other PDFs, suggesting a link farm or a distribution mechanism for malicious content. The primary URL, 'https://baarspo.ru/strik?utm_term=descargar+biblia+cat%25C3%25B3lica+en+audio+para+celular', is likely a lure to entice users to click and download further malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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=descargar+biblia+cat%25C3%25B3lica+en+audio+para+celular PDF link annotation
    • http://rufejupewanun.iblogger.org/chiaro_corso_di_italiano_b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_6068d6d09ffdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_601bb654af4f0.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/eieOihB/dejimor.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxujagemo/aQPjbwT/rifuwatakolokisidibose.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374699/normal_5fed69f5a74be.pdfIn PDF document text
    • https://cdn.sqhk.co/fupetabuwuf/iahqjtH/31334510651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394068/normal_600e3529e4e2f.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/1jegejh/apa_arti_dari_lulumpatan.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/wozoxub/farigosozokazefazozuz.pdfIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_5b7cf1516678425fb3e7dbd070aa41cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/60536831969.pdfIn PDF document text
    • http://tesekinapoden.epizy.com/32743811526.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/python_string_format_scientific_notation.pdfIn PDF document text
    • https://5d55c623-01b0-417f-8131-8dfd0334080c.filesusr.com/ugd/9ef046_11092e4fb3ad4112b7d61ac185a3e55b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vebisop/gabriels_redemption_spoilers.pdfIn PDF document text
    • http://lalexipitu.rf.gd/5511164445.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/gdi32._dll_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/is_the_glock_19_gen_5_worth_it.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/modolokugesu.pdfIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_8ebb679b525343a68ab8c88f4fdf6393.pdf?index=trueIn PDF document text
    • http://pokezuturev.rf.gd/watchman_nee_biografia.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_off0000dc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC74 5516 bytes
SHA-256: 97a3a05b4b8eee748098977ee77e8da24ff538fc031c5629e8c6f8f9b41a530c
font_01_sfnt_off0000ef05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 12052 bytes
SHA-256: 6df54b4d0c40b42bc514d365973c3d25fd54ba6b433a9bc44103d9b4b8e3cb9f

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