Malicious PDF — malware analysis report

Static analysis result for SHA-256 83300d383ff701e3…

MALICIOUS

PDF

74.0 KB Created: 2020-12-08 03:06:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2a770750eda3913c68e882817d57f44a SHA-1: 1d30f354f4ddcfbfb8e211b3835307275e5e888e SHA-256: 83300d383ff701e324010268373095fac2bc70667d85c5e4b7251286f130011b
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafftec.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to educational worksheets, a common tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/123?utm_term=elements+of+poetry+worksheets+with+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421209/normal_5f96878d5118b.pdfIn PDF document text
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/118d882e318410c.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/dewevodo.pdfIn PDF document text
    • https://midunaso.weebly.com/uploads/1/3/4/6/134680252/vuzagifoxip_kakavuwurap_wefewejasagefon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9579d974-1f30-47ee-859c-038336bf55e6/84476779222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5086b509-b795-46ba-9513-6fc6a087e366/63533713564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b429b23-72aa-4fe8-8a2a-b3eb786a252c/wifolitinawinik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eab716f6d44b07bedc8b/t/5fc15da2f8cdb769c616af29/1606507938970/70074203577.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/algebra_1_teks_companion_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e669b9-d421-4046-b10d-b5363587a83b/37679726023.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ce31d26ff1194f9586a7/t/5fc69b22f3de5e49b54d5b00/1606851364748/52629657593.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38bc62bbd7406581738ad/t/5fc3f8696457125654b699cf/1606678633124/verb_preposition_gerund-explicacion.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/triangle_congruence_and_similarity_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc508b027a199023acff9ea/t/5fc598cc7acac6192a81fc5e/1606785228896/nano_capitulo_122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fcccaf3-3c7c-4c30-b21f-fc4ec7fb2161/livefatobijovogases.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_off0000e4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 5496 bytes
SHA-256: 8423b86717668b2bd53ac7d55769772dcf922ee5e5740908f566393158f335ec
font_01_sfnt_off0000f76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76F 10240 bytes
SHA-256: be16dad64979d2c66ead7380862ef47a8a4958be8883e79b47e74fe8ba129fa8

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