Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95a90e66d973961…

MALICIOUS

PDF

75.6 KB Created: 2021-01-01 19:08:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b64ac6a5fc4cdfaf1a516e50e7c0a234 SHA-1: 93bc8c53abc9c2944fdee041fa6b5225e684e9ab SHA-256: d95a90e66d9739612606e9986d0b0b9a1f39e081dc1b976f68240dbec9826f49
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely used for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'Lyons creek middle school', suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://trafficel.ru/123?utm_term=lyons+creek+middle+school PDF link annotation
    • https://cdn.sqhk.co/rotogogoji/ghgdjb1/45893197649.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/je0jiEo/shelter_island_hotels_san_diego_california.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495269/normal_5fc2bd0e30917.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/gcrnAZ3/mewuzegofexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f88da774661b.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://uploads.strikinglycdn.com/files/388c7b62-f3ae-4234-a53e-594c74d30112/logulomexofudisakonewijuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52aa4b07-5872-4d0d-8e55-89d1904100eb/zerosifubov.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/hurt_feelings_report_printable_word_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/stick_war_legacy_hacked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd07b2c0-b988-47f8-82db-dc3fd209ba09/73242294021.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC840 4784 bytes
SHA-256: 0fb0a45965ee4720d27216534d9cc9c30cf9cf8d43fc5ac76144ccb84e968b84
font_01_sfnt_off0000d846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD846 11036 bytes
SHA-256: 1bc3ca4a8e3d9019e27dfc757b74ded50eb61f8b5edf2cba222e2e86059f7d31
font_02_sfnt_off0000fe44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE44 16076 bytes
SHA-256: bfd5fcdb7495bed175e4f51938194e2ecb7e505d90535bc2124716332a04a4ab
font_03_sfnt_off000112ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112ED 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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