Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc388cbf546ce30…

MALICIOUS

PDF

74.8 KB Created: 2021-01-09 18:41:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: edcacdd50badd29592a2a546858c8a17 SHA-1: 778a4d6b051a0a8f7a4920cd44948af486b45e22 SHA-256: ddc388cbf546ce3046a806c987d30d36ee675448c43734d6416cd70ab51dd67b
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'binary to text converter free'. No scripts were extracted, but the PDF structure and embedded URI heuristic indicate a malicious intent to redirect the user to a harmful resource.

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/aws?utm_term=binary+to+text+converter+free PDF link annotation
    • https://cdn.sqhk.co/ditetona/hgx3Tjh/52011514646.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366003/normal_5ff5f31044c0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462775/normal_5fe9c59b1888e.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/jeduzizonox/jansport_digital_student_backpack_rab_sylvia_js00t69d0be.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/2427576640.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/nodujakejivuvanuxuzodit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2160af9-f057-4166-809a-ffbbd2783a5b/66048494686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c661d904-d2b1-4791-908b-86d96bd2502e/befijis.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/letewex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30aa0afc-c5f3-4830-b044-d5d76fc68e74/3718030797.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/gibufefuk.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/bolamense_fc_vs_bosque_formosa_ec_df.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f41a3d2-8c57-472e-92c6-b32310717561/53769276150.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/ruweraxawepugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b9dd73-87af-4cd6-bcfe-2abbc384928f/87369571171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf1ced2-fa85-49c4-9f54-cbc045ee5fff/99431401917.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_off0000dec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC2 4944 bytes
SHA-256: 3c36257050ae8c39d6f9de2e6b08dd9a3eafb5d9ab409adebb3f7248dd05be97
font_01_sfnt_off0000efb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB3 2092 bytes
SHA-256: 13678a14b930e6d42e11b2ac41b13981c2c7f5938cc30cfb194ad51886f1f1dd
font_02_sfnt_off0000f958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF958 10680 bytes
SHA-256: a2c11c33b2f93a9c98cd1bcf615586377ad67a2aff3081ccaefeb5be1424e111

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