Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b446d295ca6633…

MALICIOUS

PDF

69.0 KB Created: 2021-01-28 11:35:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e7b000e131c65d17073d20168c75888e SHA-1: 9cd60851ae635ed02198dbc5030537d3c8e118dd SHA-256: 72b446d295ca6633eafa9d08d7d1b1dd1596739402256a4c07f6ee9073ae9902
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, including one pointing to 'bologen.ru', suggests a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with a phishing lure designed to trick users into downloading further malicious content or visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/aws?utm_term=free+printable+math+worksheets+for+1st+graders PDF link annotation
    • https://cdn.sqhk.co/kulobibab/ihdjjbN/operations_management_certificate.pdfIn PDF document text
    • http://belplitka.ru/92445817473kh1pb.pdfIn PDF document text
    • https://cdn.sqhk.co/nopavoboriru/fgcjcmB/darkness_and_flame_5_soluzioni.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/F3gjgi6/gangs_of_london_amc_plus.pdfIn PDF document text
    • https://cdn.sqhk.co/bavomizobe/jhjpLHF/vuvusamoxosalimiwek.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/EgirCib/bike_tracks_close_to_me.pdfIn PDF document text
    • http://richteam.site/542172113547sxwp.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/0Ahcjhw/xanezomujanalurizuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/hc0ihhb/i_love_crosswords_2_level_7.pdfIn PDF document text
    • http://nudistoff.club/jump_ball_in_women_s_basketball7iy64.pdfIn PDF document text
    • http://masajsalonunuz.com/p_n_achievers_b1_workbooknktu5.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/xepululejiwof/pascal_jolivet_sancerre_2017_tech_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/shepard_smith_reporting_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/jpg_to_excel_converter_software.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/jewasuluzu.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_off0000cee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE7 5760 bytes
SHA-256: 0c82b4fe3d0e986503cf704a8b3434a1dcdb592d958ef432d6884dbb53a9da76
font_01_sfnt_off0000e26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26A 10756 bytes
SHA-256: 87d3d054a57485e486e4f97e0901b54fe9d495018822b4a68463495de6e2106b

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