Malicious PDF — malware analysis report

Static analysis result for SHA-256 436003caadad9b1f…

MALICIOUS

PDF

70.6 KB Created: 2021-02-23 23:37:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f8fee1729237c23ee4687bdcb0f4128c SHA-1: 04fc583a62c7ad9d87663fab47900907fde07b79 SHA-256: 436003caadad9b1fb605c0d4034f4c7943f8d038ab4632c51fd02ce784a731b2
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://yafferge.ru/strik?utm_term=bhagavad+gita+chapter+3+summary+chinmaya'. Additionally, ClamAV detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of a malicious URL within the document body strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/strik?utm_term=bhagavad+gita+chapter+3+summary+chinmaya In PDF document text
    • https://cdn.sqhk.co/wuxobilan/hck5PFw/dc_comics_logo_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/L3KhhyZ/daftar_qr_code_my_sejahtera_untuk_kenduri.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/L6Bgihj/44208119572.pdfIn PDF document text
    • http://reassurez-moi-fr.info/kogemefipewilefzkxkj.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/clbsjd8/wrestling_revolution_mod_apk_1._932.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/jgSTmuN/little_boy_haircuts_for_straight_hair_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/idLQjfq/prince_run_game_online.pdfIn PDF document text
    • http://naxawevuvesij.iblogger.org/ponamatuxeladutasatitux.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/lowuwofuxali/display_excel_sheet_in_html_iframe.pdfIn PDF document text
    • http://viganoxoloni.rf.gd/2013_acc_aha_ascvd_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/amsler_grid_spanish.pdfIn PDF document text
    • http://vudemiziwifimo.epizy.com/simplicity_lawn_tractor_tires.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/mathematics_dictionary_a_to_z.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69A 5832 bytes
SHA-256: 5a7014b376ac3907cfc261fb0e564660385df340b007eddba856d2b16d89fe02
font_01_sfnt_off0000ea5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5E 10236 bytes
SHA-256: 69618a0cc1e8746ec324f525089a6c14c70db41b0bb2bf10746f86adf26527f0

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