Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cdb4e3025ec11f6…

MALICIOUS

PDF

74.3 KB Created: 2020-11-22 12:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0d1dbc62c85e4d8460a708fcfe1fcf59 SHA-1: 1a0ae0efe90cc34cad620e3a772e127fdc31634b SHA-256: 8cdb4e3025ec11f6d37ce9785db13c16f08f5bc2bbe8e9fac250b0257f7020c3
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 0.9998

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://traffine.ru/123?utm_term=nordictrack+act+commercial+pro+elliptical+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446489/normal_5f9eaa08e172e.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/08cb1341-a588-4f2d-9e34-6572b8d1c470/81610927553.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/75949706348.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/32406922727.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/podutufe.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/applied_linear_algebra_olver_solution_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/60593675348.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/conversaciones_escritas_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/mathematics_textbook_for_secondary_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eb976ed-51b6-45e1-a1e0-94899619f0bd/zewadobimigujovelaxukale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182d97b4-0ea4-43b2-9f46-327698be53e5/86525416742.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/fundamentals_of_engineering_economics_chan.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/baguio_tourist_map.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/ferris_bueller_gifs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df511256-e234-4e51-b585-f3eee860db4c/11313401031.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_off0000d9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A9 4956 bytes
SHA-256: 2f23d45430c45b8380187da06167f968d248554ba6ee280af8a4a1edc1834d3e
font_01_sfnt_off0000ea71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA71 10400 bytes
SHA-256: ce88123056b33732157b051fbb1e0c1169c4f936fc3c5eea16a5f1dd390aab9d
font_02_sfnt_off00010ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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