Malicious PDF — malware analysis report

Static analysis result for SHA-256 899c8d88ab293b2a…

MALICIOUS

PDF

79.7 KB Created: 2021-03-24 16:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6d66042790774c99cd356eed7c939ff2 SHA-1: f624543dd03034aaee16fc9c7715530533fa9ef1 SHA-256: 899c8d88ab293b2ab3c627d2ef4c7e6e5d940318f471ed5e45bacd719c85540f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/strik?utm_term=what%2527s+in+an+italian+calzone PDF link annotation
    • http://bonus332.site/how_does_a_trilogy_vent_workn9ml3.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/81644508585.pdfIn PDF document text
    • http://pejelurim.getenjoyment.net/aditya_hrudayam_stotram_in_english_free_download.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/wajazuweliwafadutoto.pdfIn PDF document text
    • http://feldhaus-klinker-plitka.ru/nutone_range_hood_stopped_workingg383w.pdfIn PDF document text
    • http://tameenegypt.com/vurojiwozonasesigodenotxp0bt.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/build_a_booty_workout_plan.pdfIn PDF document text
    • http://tokesuditetu.getenjoyment.net/40481595872.pdfIn PDF document text
    • http://dilawiputonu.mypressonline.com/13167747696.pdfIn PDF document text
    • http://vuwimoxit.mygamesonline.org/90080820851.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/literature_an_introduction_to_fiction_poetry_and_drama_ebook.pdfIn PDF document text
    • http://vonoxafaku.scienceontheweb.net/synonyms_and_antonyms_worksheets_4th_grade.pdfIn PDF document text
    • http://agreevudb.rest/89829738316nl60w.pdfIn PDF document text
    • http://zixivudu.getenjoyment.net/19738784576.pdfIn PDF document text
    • http://prizinsta365.online/reading_comprehension_exercises_with_answers_a2z2e5w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ligole/which_book_is_best_for_economics.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/nc_driver_license_renewal.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/rutelegevutajejos.pdfIn PDF document text
    • http://vawirir.atwebpages.com/wuzukokotaxakejekise.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/wedding_invitation_template_video_free.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/78607226721.pdfIn PDF document text
    • http://pudugivifo.myartsonline.com/3748940170.pdfIn PDF document text
    • http://nuwadolonopip.onlinewebshop.net/moxowozojapo.pdfIn PDF document text
    • http://futakanawus.onlinewebshop.net/92595145454.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/what_is_the_best_rub_for_smoked_brisket.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2A 4676 bytes
SHA-256: 3cce726fc062eb9fdf14feca72ecb9bec9d731a1d5ab4a1a5e600b02586bd96b
font_01_sfnt_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 12040 bytes
SHA-256: b74430109f6fd1d93674b496a3daa9a6abb704f1cea198bf7c9d22b1b6a502f5
font_02_sfnt_off0001235a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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