Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9804af0008e71c…

MALICIOUS

PDF

75.9 KB Created: 2021-02-20 04:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d4dc25874d677c401dadded553991f8a SHA-1: d4b037b5bfd8a328af99523e850a50d68a439f71 SHA-256: ab9804af0008e71c48ff7ce1a849284ecc4324c6e8e0d24e2537f398fd70e606
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious URL, which is likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain text related to the URL's query, suggesting a social engineering attempt to trick the user into clicking the link.

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/strik?utm_term=is+augmentin+875+good+for+tooth+infection PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411915/normal_5ff24849ea454.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377924/normal_6001d0faeaa8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424991/normal_6002e22320955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504554/normal_5fe933a29d66e.pdfIn PDF document text
    • https://cdn.sqhk.co/bivosemubo/W4Nhbjg/70975792688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5fe6ca3b741f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470027/normal_5fe140fbb3f7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418013/normal_5fefd249932c5.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/wibadinavosunom/mugewutoguz.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/xbox_360_platform_games_top_ten.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/95928766672.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/win_10_32_bit_iso_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/ssms_format_sql.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/net_framework_3._0_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/david_copperfield_questions_answers_chapter_5.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/doubles_math_worksheet_first_grade.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_off0000dba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA0 5620 bytes
SHA-256: d87d12eb835b063414ada1627004ec1619e2a033d1143ea22df300291a69e062
font_01_sfnt_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 11156 bytes
SHA-256: a4c2efac0713dbad0eb44e6e5343113dd951d9e912a8bc88425fe81e7df8d82f
font_02_sfnt_off00011454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11454 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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