Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a09fb0051c1cad…

MALICIOUS

PDF

59.2 KB Created: 2020-12-01 19:56:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 45dc4e8ba82bd8e00aa9db31ef856c77 SHA-1: 5938af99570ed8d9c71bd39abf86ae9aa786fd25 SHA-256: d4a09fb0051c1cad08da743901373b6f3f84f7a6ea6edbef99950067906addfb
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to 'trafftec.ru', which is presented as a search result for a biology textbook. This URL is highly suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/wb?keyword=glencoe%20biology%20textbook%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500910/normal_5fb2546b31495.pdfIn PDF document text
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/1015620.pdfIn PDF document text
    • https://jedarixires.weebly.com/uploads/1/3/0/9/130969076/6999914.pdfIn PDF document text
    • https://tigelulipuneve.weebly.com/uploads/1/3/4/7/134746657/jununosogome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5f9636ef44216.pdfIn PDF document text
    • https://josafobuwevaj.weebly.com/uploads/1/3/4/4/134464642/2232412.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/tosevud/gijadupepotipikabotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a580965-089a-49f4-8bfd-3bbfb85692d1/southwest_states_and_capitals_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/foredawilopukejeguj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3517d525-71ed-4779-9668-8108d69efa94/62623560496.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/6389073184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0ec33c-d356-4919-99f5-be4360a38489/12270477361.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/asme_bpvc_section_ix_2017.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_off0000ad5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD5A 5244 bytes
SHA-256: 7702b542a28fc7ddde3758d84cc9885f17a454997b97e42fe1c1899c4b96f369
font_01_sfnt_off0000bf61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF61 9600 bytes
SHA-256: 18a05b78f68d42528530d5dd0920d30a5e2a6b590fedb5f03dbac6bbaa2c02ca

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