Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82990f04bd2578e…

MALICIOUS

PDF

62.7 KB Created: 2021-01-21 13:18:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8454cbfe784aef5c6ac8fe20112c1ceb SHA-1: 77f034408eab05d2ae9f41499e32071fb5fed1fb SHA-256: d82990f04bd2578ebdfb72bd55bebd7e17217770c498c247f10bef54e4aff6df
154 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier and ClamAV also flagged this file as malicious, indicating a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to lead the user to malicious content.

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://gettraff.ru/123?utm_term=rolled+hem+presser+foot+pfaff In PDF document text
    • https://site-1253393.mozfiles.com/files/1253393/jukilenek.pdfIn PDF document text
    • https://fisudobu.weebly.com/uploads/1/3/0/8/130813554/fuzetokesakilazelu.pdfIn PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/zododaxa_goxuwerurixaxo_mowonufomen.pdfIn PDF document text
    • http://penaleduduzib.iblogger.org/ropad.pdfIn PDF document text
    • https://site-1190022.mozfiles.com/files/1190022/ligodama.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fadakivok.rf.gd/advertising_id_android.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/windows_10_feature_update_1903_size.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/adder_snake_information.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/54739173837.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/pofuvozozenilipototekaram.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/covering_letter_template_administrative_assistant.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/baffler_standalone_2018.pdfIn PDF document text
    • http://gakupoxefale.epizy.com/oracle_forms_forms_ddl_commit.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/bibliography_format_for_books_mla.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_off0000ba44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA44 5288 bytes
SHA-256: 6f23682af683146afab609ac0c9e00d1c7030ec38b597bdbbfd708660cdffee5
font_01_sfnt_off0000cc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC11 10048 bytes
SHA-256: 566f8a2268a2a7bf2bf87fa555d1bcb7fa1aa5cc70b8a4aab452bf7310ad1c92

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