Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29542de2b3549c8…

MALICIOUS

PDF

79.3 KB Created: 2021-03-01 06:13:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 68c1a0c64cfa6c4939355fccd6919de5 SHA-1: a113a78d2c182b9dfda3b7f17302c1fe09aa6222 SHA-256: d29542de2b3549c845a0733f103e6cdd67e181e94853d6daa4da9f31f29bd369
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'nipisod.ru', which is likely the primary malicious destination. While the document body is heavily obfuscated, the presence of external URIs and the overall detection profile strongly suggest a phishing or malware delivery attempt.

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://nipisod.ru/strik?utm_term=what+are+the+purposes+of+doing+academic+writing PDF link annotation
    • http://zonerokemub.getenjoyment.net/mapepujamodujiwewazofo.pdfIn PDF document text
    • http://getplafond.xyz/harry_potter_characters_images_nowpz6vd.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/machine_learning_jobs_salary_in_canada.pdfIn PDF document text
    • http://dmgameplan.com/aquatic_biomes_worksheet_high_school8kqnz.pdfIn PDF document text
    • http://shoop-ft.ru/44779512889egw79.pdfIn PDF document text
    • http://wwbook.org/why_is_my_uniden_phone_not_ringinge2dj1.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/norozovijalu/how_to_flush_lay_z_spa_pump.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/xogeganenopu.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/enterprise_cobol_programming_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/aroma_rice_cooker_arc-_363ng_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/ffbe_trophy_guide.pdfIn PDF document text
    • http://fujalur.epizy.com/82831815907.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/zikoroxetupipef.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/apk_tahu_bulat_mod_apptoko.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/wabavitabimulobitoduz.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/84116749508.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/jufiduzatonanufosav.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/bestimmte_artikel_bungen.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_off0000f887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF887 5640 bytes
SHA-256: 93ea281348eba45f1da4f397ef17cd46ad2fa20418c3265a2d3621d4ffd6f2a2
font_01_sfnt_off00010bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAD 10820 bytes
SHA-256: 170acaf3e32d42b59ede748971d520c3dcde33abd8c6a2a31b0f6f364f09fde4

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