Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9de12bc2996b7c6…

MALICIOUS

PDF

71.3 KB Created: 2021-02-13 13:38:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c4629c5466d9fd0d7e147dc40014a7bf SHA-1: be50cbf0391b082ef3bf094f79ae3a997356c5ce SHA-256: d9de12bc2996b7c6f7d08a761296d67a8475371efe81fe6562ce537fdea82d81
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains keywords related to a medical center, suggesting a targeted phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/wb?keyword=albany%20medical%20center%20information%20technology PDF link annotation
    • http://tuguxanofa.iblogger.org/37840775473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476750/normal_601d531c42dd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485579/normal_5fcd2679e7d26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_60127ade8654d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417039/normal_5fee619c51a8f.pdfIn PDF document text
    • http://jirobanu.22web.org/mitosis_and_meiosis_chart_answer_key.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446285/normal_5ff822f9ae4cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491450/normal_5fe1f5657186e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481825/normal_5fc60fc140d8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388612/normal_5fdc3d276d2b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445726/normal_5fc945e5aa9c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454556/normal_60017a3f5b76f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411944/normal_6009a916dbbd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476766/normal_5fdfde956d7bf.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
    • http://karifopiti.epizy.com/excel_2013_manual_calculation_default.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/tiwisotirafekofezagosir.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/volume_of_rectangular_prism_worksheets.pdfIn PDF document text
    • http://kasaxamaburabuz.epizy.com/rekagezepiwaf.pdfIn PDF document text
    • http://jimabepur.rf.gd/ropixojupo.pdfIn PDF document text
    • http://repafow.epizy.com/62512382391.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/design_patterns_tutorials_point.pdfIn PDF document text
    • http://pexevogawi.epizy.com/nakaji.pdfIn PDF document text
    • http://zuxamivim.epizy.com/silovomebugekixopizosuru.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_off0000ce67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE67 5276 bytes
SHA-256: a3897d0ba9553f1f9f75172214a7d7936228950efbf852237054a17330ba2a92
font_01_sfnt_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 9768 bytes
SHA-256: 2d40efb2b186e7cb6bfd4c7b1551b35604689d9ce9e1994c459128e074be01d9
font_02_sfnt_off00010177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10177 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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