Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a436a63b438f8f3…

MALICIOUS

PDF

77.6 KB Created: 2020-11-26 14:36:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d14dc2d2d39be3d4f3471caaff1dcd13 SHA-1: 6ea247b4dca816662ec494857e03657fd06777a6 SHA-256: 3a436a63b438f8f3259568ff60e4397abdd3fdcc767f6ad6b4b57c9f2a588f79
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 flagged by ML classifiers and ClamAV as malicious, specifically indicating phishing and Trojan activity. An external URI pointing to 'traffking.ru' was extracted, which is a strong indicator of a phishing or malicious redirection attempt. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to lead the user to a harmful external resource.

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://traffking.ru/123?utm_term=woods+charter+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447276/normal_5fa0ad68e42e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426062/normal_5f9a34e42400a.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/kovezodepugov/sutolurawel.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/34268097758.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fce94eb7-a970-4d10-92a4-aedb1b50575e/43762585610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a073220a-d22a-4876-9565-8d6f944c3b02/types_of_artists_books.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/64868713486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22fc3d13-0e17-417c-8c11-a86f1c133c0f/instalacion_hidraulica_y_sanitaria_de_una_casa_habitacion.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/23620555466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fb01952-d1c7-4ce6-b9c4-68633aa49ceb/28467468593.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/deniwo.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/veritas_entitlement_management_system_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/3d_animation_cartoon_software_free.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_off0000e86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86D 4672 bytes
SHA-256: a0d230fe03d9c65436d6a02212b2dc61f32bd94508ddfd506bb1158d8fbf0485
font_01_sfnt_off0000f86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86D 10216 bytes
SHA-256: cd23abd27e80eb9b4578d196192036c96923cd6d25d9e5426454119781b56f6d
font_02_sfnt_off00011b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B50 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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