Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16f1d849806d059…

MALICIOUS

PDF

71.8 KB Created: 2020-11-11 03:17:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 73c4bed487c82d8bbd6e566969511a80 SHA-1: 236e2b09808fdb344164e24a3da7b856d6b4f89c SHA-256: a16f1d849806d0599436d4da3cd87fc21e86ae54b5263b6b519be96e9c03be2a
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 ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI pointing to 'traffking.ru' was extracted, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and embedded URI indicate a malicious intent to redirect the user to a potentially harmful site.

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/aws?keyword=simple+interest+worksheet+answer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446931/normal_5fab185650a14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f8bc395ac718.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/the_lovesong_of_j._alfred_prufrock_analysis_line_by_line.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/43260891704.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/certificado_medico_escolar_sep_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/25769275689.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/foothills_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/android_apk_editor_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/the_law_of_sines_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/the_voices_2020_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/wetezadozifapetutiguxam.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32D 5316 bytes
SHA-256: 69459e40622753d15fde5422f063a85cf096e66cb80b60d1def0871d48ae3e77
font_01_sfnt_off0000d521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD521 11124 bytes
SHA-256: 991cd7744a290c2933d37d392e55f872903cdc6aabab627f776a19465e877b4b
font_02_sfnt_off0000fb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB78 16600 bytes
SHA-256: 284ca06941c079b301fa259dfd1902cea13cebd7bc101fb0cd5d5265a57fc06d

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