Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ad5e89c7d28c6e…

MALICIOUS

PDF

80.5 KB Created: 2020-12-23 00:51:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7719c52501d512cbe7bfb5ca5fa12e77 SHA-1: 5f7b94fadcfaa31b5b2106af7bba07b55b7ca63b SHA-256: 23ad5e89c7d28c6e7afbf8e9dceed786848fcce044d8eccc3627e7237497e753
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/aws?utm_term=formative+assessment+strategies+for+kindergarten PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414358/normal_5faac865bdda7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_5f9bfc149815e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5fbdc918e264c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414868/normal_5fa0040fd66c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1e09fbdb33045eec91c30/t/5fc5525a3c02f22b9dbcc222/1606767194900/abbyy_finereader_12_serial_number_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/82090112040.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfd92f5b7bc96605610b65/t/5fe0107bc18bd5077cc9bd0a/1608519803925/themes_ms_powerpoint_2007_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/daily_work_hours_log_sheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0abc6bda9c57a97bd16fd/t/5fc26eae7acac6192a0f565f/1606577839903/jackson_high_school_football_stadium.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af212f6-086e-4493-80df-b4edcfe0b6ce/dadefadone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0beb7094-03f4-425b-a81d-bf33bc27f35a/alita_battle_angel_anime_sub_indo.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/dowilumeledis.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/bepazinumufozotudij.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_off0000ff92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF92 5272 bytes
SHA-256: 2a5d7dd7b628cc9d47a6e0c35a9ac13fbb8ea61a59faf9c65a74d908b8a039f9
font_01_sfnt_off00011179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11179 10268 bytes
SHA-256: 774e6064883f008b778eded60108cd649a77a1cc67e99e68f31754f7bd64c3f2

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