Malicious PDF — malware analysis report

Static analysis result for SHA-256 36da250cf8d2a0f0…

MALICIOUS

PDF

161.7 KB Created: 2021-04-26 13:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a6765ea72d1e658d9b7beab0bebe5017 SHA-1: e178464483eed27e797e5fa3cc46c30eea0cf3d8 SHA-256: 36da250cf8d2a0f0fac2ef711cca4cf0cadf4563f88194a768d9214998fe07be
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to host a malicious payload or phishing page. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9733

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://kuzutuzo.ru/strik?utm_term=world+of+ideas+jacobus PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490376/normal_60164f3696d83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424985/normal_60293104a99ba.pdfIn PDF document text
    • http://tonalemeketav.66ghz.com/how_to_scroll_with_magic_mouse_2_on_windows_10.pdfIn PDF document text
    • http://zajakewezu.iblogger.org/geyser_installation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428052/normal_602b88a3bf419.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/rejiner/29176023023.pdfIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_5fa37d4b1da5455883c93146aa12d8df.pdf?index=trueIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_6d4d961936f34540a21dacdafa09df9c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rotowan/godrej_industries_annual_report.pdfIn PDF document text
    • http://zuxakenupe.epizy.com/reading_comprehension_exercise_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/lenuwagim.pdfIn PDF document text
    • http://sasebuza.epizy.com/dallah_albaraka_group_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/57123367753.pdfIn PDF document text
    • http://gunuguduwurenog.epizy.com/23808502624.pdfIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_3ecae0eccf064f16aaa863239fa78221.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/gikupudimekozebifopovaji.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/cheap_clearance_sheet_set.pdfIn PDF document text
    • http://givisobutut.rf.gd/59915726899.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off00024424.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x24424 22560 bytes
SHA-256: 46cfa2c002af69631453e5a47fb479b3a08e61926d2b27667130c9dde3978d1d
font_00_sfnt_off0001977d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1977D 33832 bytes
SHA-256: 0b15dace4eb0d93f6e128068c976694c9572bec043f0d18573caa656f5b04b28
font_01_sfnt_off0001ff6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF6D 5244 bytes
SHA-256: 7e02ad97d7ea3689cd5c136665426ea3696a259fdf75cd3d0dce7ca795cf5d2c
font_02_sfnt_off00021156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21156 1704 bytes
SHA-256: 523a8dd527fa8b10b5b0e82b6b7915fcf34072d2798acf2ef770667799eda2b2
font_03_sfnt_off000219d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x219D6 13784 bytes
SHA-256: 1da25ca641f660cfd844fc3a5a6748063be139cc8a5b154f8cd28157d8b0d785
font_05_sfnt_off00026baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26BAA 3188 bytes
SHA-256: c4857345c0c41ae25edaf82e057b0df22e8e85b1529fc589e73382f515835b4b

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