Malicious PDF — malware analysis report

Static analysis result for SHA-256 434e82ac947a36ca…

MALICIOUS

PDF

85.6 KB Created: 2021-03-16 13:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 402962148f5201561f8d2e9464ac363d SHA-1: 59facfe3c53c3942f4924ed2ce6251e0e68867a6 SHA-256: 434e82ac947a36ca1dd514ed5695ceee16c94d24c203aee8a756c7fadd2416bb
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a malicious payload disguised as an award or prize. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the presence of an external URI in a PDF is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://midufefew.ru/award?keyword=colloquial+french+dictionary+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499979/normal_5ff589fb62ad3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495409/normal_5ff9adb4b1111.pdfIn PDF document text
    • http://wemuwugisenoro.iblogger.org/2019_lexus_es_350_interior_dimensions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415519/normal_5ffb4bfe29df9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482880/normal_5fe4e527d0c64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366398/normal_5ff25c51a5d4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_601845a0c82e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501632/normal_5fcdd27e787e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465705/normal_6020a1d871a9b.pdfIn PDF document text
    • http://verulusoba.iblogger.org/how_to_clean_my_humidifier_without_vinegar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezatavaveb.epizy.com/347103468.pdfIn PDF document text
    • http://donafilozevore.rf.gd/tukuvasoginogarugupisanag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d824f3d-a8f7-4827-9dc0-d93cdf40152c/honeywell_wireless_doorbell_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b9df09a-97e4-4477-b0a8-a19e2aa6c61e/reading_comprehension_worksheets_year_5.pdfIn PDF document text
    • http://dimegebewode.epizy.com/android_auto_2._8_apk.pdfIn PDF document text
    • http://bulujulu.rf.gd/dasajizesi.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/hungry_shark_mod_apk_dayi.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/cover_page_template_word_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/biblia_hebraica_stuttgartensia_de_estudio_en_espaol.pdfIn PDF document text
    • http://numadipabep.epizy.com/14570192680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f122201-b356-4628-b458-b7497812ffb1/62272409673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22453bb1-8cb6-49b4-b069-53eab4b90766/cfop_method_pll.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1032d3ca-e54b-4c58-b997-edf1229da21f/lagoxifizepigimokevew.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_off00011269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11269 5196 bytes
SHA-256: d97c54a577d91f608cf91da93e0a25655491506a334277e6f898bfba100cda6a
font_01_sfnt_off00012418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12418 10760 bytes
SHA-256: aaaf348bd3fd7f423da7806f76754ff1593c2e9e3ef5eae604db2008d3c0bd2b

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