Malicious PDF — malware analysis report

Static analysis result for SHA-256 e216a3fc0039483e…

MALICIOUS

PDF

75.9 KB Created: 2021-02-18 15:46:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d561e5efc0722dd32616a8e81949a9f6 SHA-1: 457b629790bc42f57fb807637bf6f6d0302c1f98 SHA-256: e216a3fc0039483e4fc630d2d71e09287dd2e528a45f490945f5db25a4e378d4
116 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely contains malicious content. The document body, though heavily obfuscated, contains text suggesting it is related to VBA code for opening PDF files, which is likely a lure. The embedded URL https://jottigo.ru/strik?utm_term=vba+code+for+open+pdf+file is the primary indicator of a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://jottigo.ru/strik?utm_term=vba+code+for+open+pdf+file PDF link annotation
    • http://wamuvosuvebupa.iblogger.org/rigobimifenutagu.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/5FheRgi/top_race_car_games_ps4.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/pomaxa/sosulekowateninaveji.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/a_day_without_rain_enya_album.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/score_hero_football_game.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/spider_man_1994_animated_series.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/body_linen_massage_table_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/bixoxobib.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/44241140537.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/47598407191.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/breathe_pink_floyd_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/71076957906.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/72668972559.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/97619159141.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/51782525350.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_off0000ed4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4A 5076 bytes
SHA-256: 384c9653cc6f7212ebed2f76d82467c33da8737d868a80ddbb27d3a07c8f4108
font_01_sfnt_off0000fe9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9D 10592 bytes
SHA-256: 193b92ea41d0f85ea02044e5289074234387acf7fd3a2c285c1bd8dd87d3db60

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