Malicious PDF — malware analysis report

Static analysis result for SHA-256 f983a286f1841e3b…

MALICIOUS

PDF

70.4 KB Created: 2020-11-19 05:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 90a0db8f503ad167fdd5e53964f2ca60 SHA-1: b37f9e9e78679307bd3ec93f2499f4bb0614e657 SHA-256: f983a286f1841e3b28fb22a9d66fe7bdaad94b252800a348b9512cc062f95362
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafftec.ru', which is likely the primary distribution point for a malicious payload or phishing page. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit users through a deceptive download lure.

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=bbg+stronger+pdf+gratuit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424696/normal_5faf8d65b44e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377112/normal_5f95cdaa92bf9.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/9700f9ec-ee87-435f-afee-ec4c9c51d9a9/dizudekexexezifuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/bauer_topic_font_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/144590c1-437f-4269-926c-a78a51e7e02c/tarjetas_de_almacen_peps.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/excel_calendar_template_2019_2020_editable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba92f053-f4ee-4518-8bfe-834f3bdc328d/xekugalipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c1b51f-847d-4f6f-bc0a-668b60c67816/el_destino_de_diez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e350f186-1766-41f5-9409-457744d0e8a2/nebekaxagen.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/us_foods_item_search.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04f3f070-1e52-4cd8-b3bd-96e0f10dad77/xemakemamedegekipopufo.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/pivoxizewan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d141ab7-8d11-4cb0-8b9b-8bd8700c3395/pour_apprendre__chuchoter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e11f5cab-922b-4e22-8ae2-6268d2d230eb/jerusalem_cookbook_shakshuka.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_off0000bc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC37 5368 bytes
SHA-256: e5de134ea72d2c5b444096376a38536251db09cec9478def51350b919c82a87a
font_01_sfnt_off0000ce84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE84 11084 bytes
SHA-256: a4790d9dd36fef507d06ffee7eeba73ffb33df59c4126355d503732fb79bab39
font_02_sfnt_off0000f43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43E 16940 bytes
SHA-256: 81ec719e4c44de671b8578c14f796c1d80218673b8a50d5c9538b8757847e302

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