Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2a2968286a364e…

MALICIOUS

PDF

75.0 KB Created: 2021-02-17 22:28:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0ae82cc0b0c062d0c08811d221b276c2 SHA-1: 1d5474b382635271bb7ac99ce70aa1e3adae5025 SHA-256: df2a2968286a364eb541dcf21f63b8f975a05422be7113bb4ab5674ac79bcb28
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=eberron+player%2527s+guide+pdf'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The document body appears to be corrupted or obfuscated, but the presence of embedded URLs and the redirector link suggest a phishing or malware delivery attempt, likely initiated via spearphishing.

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
  • 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=eberron+player%2527s+guide+pdf In PDF document text
    • https://cdn.sqhk.co/bevoletef/iEDhegd/la_vie_en_rose_izone_lyrics_espanol.pdfIn PDF document text
    • https://cdn.sqhk.co/rarinuva/fcjgctH/zepuvefifa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402711/normal_5fcb2e26b43c3.pdfIn PDF document text
    • http://kewavixim.22web.org/40173327007.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367311/normal_5fcd50c188c8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470521/normal_60096b22e6a92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495975/normal_5fc9a05dea4e2.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/jchdjeP/14044818795.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/nerugiraxura/kululaturijof.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/geometry_and_vectors.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/99_names_of_allah_printable.pdfIn PDF document text
    • http://kubumoran.rf.gd/video_er_for_instagram_and_facebook_apk.pdfIn PDF document text
    • http://teguwawax.rf.gd/wikeda.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/binary_options.pdfIn PDF document text
    • http://nozumipoz.epizy.com/77492087336.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/jonesuniz.pdfIn PDF document text
    • http://tavokitewigi.rf.gd/gozipozu.pdfIn PDF document text
    • http://rigirulame.epizy.com/adobe_photoshop_cc_2017_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/nuzujeziv.pdfIn PDF document text
    • http://bikevobo.rf.gd/esp_module_7_grade_8_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/build_guide_maokai_top.pdfIn PDF document text
    • http://jixojamut.epizy.com/monthly_calendar_2015.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_off0000e599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE599 5440 bytes
SHA-256: 45d7b06fea12bfa50a7cd243b356635868349d5d9787cc7d8cd01e2b30bf6887
font_01_sfnt_off0000f835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 11248 bytes
SHA-256: dfb945a795acc7effcdc1e6ace3444c54fe98cd98bec1eb6ed1521df9ac91121

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