Malicious PDF — malware analysis report

Static analysis result for SHA-256 475e63516edc0c71…

MALICIOUS

PDF

75.8 KB Created: 2021-02-20 23:13:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9387b718411631a41feb021cc2699b7e SHA-1: 6879dd707e5d255a138c1b7fdde3ca5eaa3a18df SHA-256: 475e63516edc0c71b110b51cc17dcf09737ee7296a285f550aa24eca7b239673
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although the document body is heavily obfuscated, the presence of a malicious URL is the primary indicator of compromise.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=evolution+by+natural+selection+answer+key In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/zulem.pdfIn PDF document text
    • http://lulagewuf.rf.gd/nexus_10_price_in_india_flipkart.pdfIn PDF document text
    • http://sibubixusa.epizy.com/95379584189.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/zofudawif.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/android_view_background_color_gradient.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/arya_2_full_movie_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/nedudizakufalulazo.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/pushpaka_vimana_movie_songs_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/cmos_4001_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/car_loan_emi_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/55679473754.pdfIn PDF document text
    • http://xokesuluz.epizy.com/brobar_boli_song_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/32543254750.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_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 5208 bytes
SHA-256: 959944cb234b4f57f0c16b6e8ae15228eb9b4df1a64a4cebcaeb10fde9ee84c3
font_01_sfnt_off0000fedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDD 10340 bytes
SHA-256: feb7c8b8439ab8b4090e87baf8408a264057f59bc4c3de831f10e9b0f9664608

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