Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf42d90e430c2e3…

MALICIOUS

PDF

77.8 KB Created: 2021-02-06 16:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: d3d125c162b788316890eb0fc43c130c SHA-1: bbd34512747b60a1d4fa02af42044378e4ed88c0 SHA-256: bdf42d90e430c2e3eeaa3dcd5203aecf93707426093e08fd607e4a7e596a5ec1
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'jottigo.ru', which is likely part of a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URL strongly suggests a malicious intent to redirect the user.

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://jottigo.ru/aws?utm_term=ballroom+e+youkoso+op+full PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365540/normal_6006f6e37ec1e.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/fokuxafapovakomkxv2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_60192a3834c16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479942/normal_6008d031873e0.pdfIn PDF document text
    • http://goodsfor.life/physical_science_chapter_11_assessment_answersfv4ow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://waraxiv.rf.gd/79601178718.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/gutter_helmet_reviews_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/dusazisosixeb.pdfIn PDF document text
    • http://nivugugop.rf.gd/rigafolidewomixurunem.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/somav.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/91822221982.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/51070291351.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/url_http_._mantratecapp._com_forms_files.pdfIn PDF document text
    • http://norilonabu.epizy.com/wejuxebepejugafowopi.pdfIn PDF document text
    • http://nenutufap.epizy.com/mv_bol4_to_my_youth.pdfIn PDF document text
    • http://fozabenisos.epizy.com/14661984817.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/xafuzanafoburatejeza.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_off0000ded9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED9 5504 bytes
SHA-256: c41271bb4a493197ee7b758cf88cb4b46b83c6cd37bc01059ca4310fed42323a
font_01_sfnt_off0000f1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FA 5260 bytes
SHA-256: aa83814f40efb000e8830f175b0f0739ed7ad8e6ba97260e6193bcacaeaad3f0
font_02_sfnt_off000103d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D4 11380 bytes
SHA-256: 60f36649e45183705ae7ae0ce90b9c064ebf6a53a897e0483380051a138e5a98

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