Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1474c8b3db6ed72…

MALICIOUS

PDF

71.0 KB Created: 2021-04-03 18:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d47b280d713c06ba402754a3e27fc68b SHA-1: ed8cc67adc241d0a283582e14387e9d70150a244 SHA-256: f1474c8b3db6ed72c2c4419007142b9443ebb1550c87855e690bd15b9102408d
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'zajinet.ru', which is likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=salman+rushdie+satanic+verses+audiobook PDF link annotation
    • https://cdn.sqhk.co/mamevugixej/jhfEgiN/dobomow.pdfIn PDF document text
    • https://cdn.sqhk.co/novujarogoga/ehbSRje/french_manicure_nails_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465914/normal_5fdfac6b0adbc.pdfIn PDF document text
    • http://hamsterbig.com/big_little_lies_soundtrack_theme_songti0k2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388825/normal_5fdf3c91cce93.pdfIn PDF document text
    • http://catsism.com/dividing_polynomials_box_method_worksheetu5myv.pdfIn PDF document text
    • http://bozesedixek.mywebcommunity.org/bhagavad_gita_free_download_in_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/gafazakedoki/sieiibi/90570855622.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490524/normal_60031b1a62e85.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407818/normal_5fcd164f26bf8.pdfIn PDF document text
    • http://brumbum2.xyz/main_tera_boyfriend_raabta_song_downloadp1dri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_602c7bfa8ddae.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/67834198038.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_a03f826823fb4de188c42df74b310879.pdf?index=trueIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_3b348f82d1cb4b7594845e32cfe0033f.pdf?index=trueIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_0fe8b87178c64ca9acce15a78a501566.pdf?index=trueIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_7123ad8bd85b432a8e5dee9b4803b9d8.pdf?index=trueIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_62c21ea6b56c4fadb88e09e831e7518b.pdf?index=trueIn 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_off0000d5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B4 5544 bytes
SHA-256: 47bfb7409d61a65fa773d2886ef89557a3205644ed93df4aae08e816c5ade88a
font_01_sfnt_off0000e867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE867 11644 bytes
SHA-256: 8236f9f9f2e6180500ad5a3a60c3b849410a03b753d68fcd2704a2b3132646c6

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