Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc2dbc170f85c49…

MALICIOUS

PDF

88.7 KB Created: 2021-04-23 00:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 606f0dfab02ff68320f881c580c99ee7 SHA-1: 373655fc0e6a289054ae3ebdcbc8ba4697f8256e SHA-256: 0bc2dbc170f85c4964a8018aa60c7eb0b3379961195ce06ace8c7d159cd2882a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'https://zajinet.ru/strik?utm_term=twilight+breaking+dawn+part+2+movie+watch+online', which is likely a lure for users to download malicious content or visit a phishing site. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a movie download link.

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://zajinet.ru/strik?utm_term=twilight+breaking+dawn+part+2+movie+watch+online PDF link annotation
    • http://donurejin.iblogger.org/sigaguzejewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_602b6a4c0ff1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383930/normal_6052d54545056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379219/normal_606dc9c62ed84.pdfIn PDF document text
    • http://fikitenifazela.iblogger.org/selected_writings_from_mikhail_bakunin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_6011d49d72d10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501028/normal_5fe3de174477b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386852/normal_600629059fe26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445125/normal_6050f271c2859.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/adaway_apk_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/dufikefijijibutixitatosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/850ef024-a625-42e3-99d0-c21e477c3c22/the_secret_2006_movie_in_hindi_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54bbf4ef-0bac-48df-a225-5920d00de78a/72239024442.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/73986053534.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/27650486197.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/how_to_clean_bissell_proheat_2x_revolution_pet_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/xoguxonex.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/red_harvest_top_kindle_books_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/83835618175.pdfIn PDF document text
    • http://ruwiluleter.epizy.com/korapepik.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_off00011d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0B 5748 bytes
SHA-256: 9b4829846f2564ceb05bfc9091518975c5971de3d532c058117a54e533ea7b7b
font_01_sfnt_off00013083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13083 10696 bytes
SHA-256: 28ea43b0b8856583409de9d5be673a9978f4d1d3bd9ef07bf73932f46f2baaba

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