Malicious PDF — malware analysis report

Static analysis result for SHA-256 06dddcf46d86b3e1…

MALICIOUS

PDF

93.4 KB Created: 2021-04-04 10:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 99f62e8914a436927fd7bbfb7f4bacef SHA-1: 70f02e7baeb63dda5364d23219443fafabaeb2d3 SHA-256: 06dddcf46d86b3e142eeee3e3578adc82fb55ebf09040c7a44c3d9c3eaca1d8f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to health information, likely to trick users into visiting the malicious URL. No scripts were extracted, but the presence of external URIs and the high confidence of the malware classifiers indicate a phishing or malware distribution attempt.

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://seumenha.ru/strik?utm_term=how+to+tell+if+something+is+wrong+while+pregnant PDF link annotation
    • http://supernefritroller.xyz/953595127485q0xe.pdfIn PDF document text
    • http://jilavixit.medianewsonline.com/sigitononimov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458389/normal_604724544ca5b.pdfIn PDF document text
    • http://blognews.top/3024749916iqvgp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454420/normal_6033167b74c25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486778/normal_5fd19d978bdc4.pdfIn PDF document text
    • http://pixizosusonaxij.sportsontheweb.net/karitixaponanube.pdfIn PDF document text
    • http://feziweninepiv.iblogger.org/46930622133.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_749b2563bae041b5a134b28f31ff75a0.pdf?index=trueIn PDF document text
    • http://zirugobaxunorix.epizy.com/archaeological_field_data.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/attendance_register_format_for_staff.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/jotof.pdfIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_27cded2bdd5945319298b9db278906d1.pdf?index=trueIn PDF document text
    • http://xupasafagimi.rf.gd/62422040736.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/jingle_bells_flute_duet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/40891164220.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_off0001313e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1313E 5368 bytes
SHA-256: 914e6bd1e10fae98d4203e7506dbf5680afa4f4f28e45f6b319ef3665cbccef8
font_01_sfnt_off00014368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14368 10860 bytes
SHA-256: 6f0b0ea89ba6e8044727e85511835a30f88ed624553b43e623c175ad460d91cf

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