Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fb8ea80efc7ad0…

MALICIOUS

PDF

64.8 KB Created: 2020-12-15 10:07:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 31550ba5859ff2e7db8615e9fd76619e SHA-1: edee85bc1875666fff3fcd578b15d3f1a4f44182 SHA-256: e0fb8ea80efc7ad0a406367dfa28c5d135de5b6beab58ff3f26d8590e0366435
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of external URIs, specifically `https://trafffe.ru/123?utm_term=prentice+hall+literature+language+and+literacy+grade+9+pdf`, suggests the document is designed to redirect users to a potentially harmful site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

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://trafffe.ru/123?utm_term=prentice+hall+literature+language+and+literacy+grade+9+pdf PDF link annotation
    • https://novadoja.weebly.com/uploads/1/3/4/8/134873208/2480525.pdfIn PDF document text
    • https://rizadubarezesul.weebly.com/uploads/1/3/4/4/134499036/8867297.pdfIn PDF document text
    • https://difekubo.weebly.com/uploads/1/3/4/7/134714923/1435462.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tazopaju/emulator_android_linux_ubuntu.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/curse_of_the_crimson_throne_the_trove.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/abc_s_in_cursive_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/teacup_shih_tzu_for_sale_in_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/377c256e-157b-42b9-9b08-29f6c4c1cba1/runopubulalimulituwemosu.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/nabixumetesatixotabesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7751a916-5dec-404a-b588-c59a7b38ad75/gotebekovakexene.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc112c117e7202640eb3140/t/5fc3bebd9ee0f32b87c5bf93/1606663869590/91413570568.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55ba5239b0722914ef72f/t/5fd699b8e5ac5828962b3069/1607899576482/alcatel-_lucent_ip_touch_4028_phone_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/adblock_plus_free.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_off0000b301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB301 5268 bytes
SHA-256: c9a9d0de9e01386a879e956322ebe3932670791a9b0bb9486da3815f80bda6c4
font_01_sfnt_off0000c4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DE 10364 bytes
SHA-256: 26bba681e597b862a726dd4ace9ac75dee7dbd610916642d6fc8efcbb2c07669
font_02_sfnt_off0000e81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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