Malicious PDF — malware analysis report

Static analysis result for SHA-256 f50767de8226f90d…

MALICIOUS

PDF

70.2 KB Created: 2021-02-24 14:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a139ba29be20d636cb91f9c3bf1fb853 SHA-1: 295d7b884719f4ec7f0853ff0cd6d5887a9ff046 SHA-256: f50767de8226f90de9f6517f9f94ce70771a8abf0382b3f735f8437c0c0d8f8c
96 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URI pointing to 'https://baarspo.ru/strik?utm_term=literary+devices+ap+lit+pdf', suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of the malicious URL and the detection signatures strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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=literary+devices+ap+lit+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482403/normal_5fefec3256d56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385436/normal_5fde2d0fb32d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470218/normal_5fdd93f4c3ea0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448740/normal_60136c6571318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475987/normal_5ff6b9f165d44.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/yjhQgeA/how_to_draw_descendants_evie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424981/normal_6009d8837438d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498645/normal_60295bc69bf4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovijoj.epizy.com/the_bloody_chamber_stories_summary.pdfIn PDF document text
    • http://xukosebufeli.rf.gd/37833176176.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/live_stream_tv_apkpure.pdfIn PDF document text
    • http://mopufeva.epizy.com/singapore_preschool_curriculum.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/vlookup_different_sheet_excel.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_off0000d551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD551 5252 bytes
SHA-256: 60ae9a8b51612c3859e768ccb396dbd845b378d7114b8718abf99da5b02036f8
font_01_sfnt_off0000e751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE751 10416 bytes
SHA-256: d7eaaab6c9460a47a3c150dda3933dc040ffdfd9d50338b6c64b82dbc8ca7003