Malicious PDF — malware analysis report

Static analysis result for SHA-256 3182598f872dbc16…

MALICIOUS

PDF

90.2 KB Created: 2021-05-18 08:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 96a7b15a3aad855310f6bdfb0f513cea SHA-1: 1c6899c31d56ccf30169162989f7fbd3e94a4f34 SHA-256: 3182598f872dbc1636e2a32b86a7d592be7ac2907b9f769bdccf981bbfee2aa6
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to educational content, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=algebra+questions+and+answers+pdf+grade+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374703/normal_600b780d36fc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403260/normal_600573a12b98e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420235/normal_606d19c9a8294.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443342/normal_6002016aab339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_606927d350a5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_602ce5920adf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449395/normal_5ffd67aa9d27d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420250/normal_604d040507ea7.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/rurosaveruk/kundali_software_for_window_8.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/58124937323.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/can_gerd_cause_heartburn.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/1361236367.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/xegow.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/bunipobedabejifepa.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/the_young_elites_weebly.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/mugiso.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/whatsapp_status_sad_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/82060370723.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/59406301088.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/qu_da_cae_domingo_de_ramos.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/what_is_considered_bodily_autonomy.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/bella_bella_song_djpunjab.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/aligarh_muslim_university_form_for_class_9.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_off00011e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E44 5748 bytes
SHA-256: aeae273e61db30c8886df5b6c3dffbf75ac483ecf24e94ef25bf30368d5a9dc6
font_01_sfnt_off000131f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F4 12188 bytes
SHA-256: f57263ed28418a5698fe9c45aa08d416428f68f4fe974ae4566ec02f06ed4b45

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