Malicious PDF — malware analysis report

Static analysis result for SHA-256 883c0b4a5582e1f6…

MALICIOUS

PDF

74.0 KB Created: 2021-01-23 20:58:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 63723ff10a1482dea2ebfbdbcb375363 SHA-1: cd75ece872a458c6ffb4394cd2bc6a9a8d8bb530 SHA-256: 883c0b4a5582e1f6b49f11c2154059628d08512e50d0b76b16f6c787bd491fd1
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a phishing site disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to lead the user to a malicious external resource.

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
  • 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://traffset.ru/wb?keyword=linear%20equations%20examples%20algebra PDF link annotation
    • https://cdn.sqhk.co/wudawagirus/EPOsjhU/1972659505.pdfIn PDF document text
    • https://site-1176787.mozfiles.com/files/1176787/fapuruwowozoxisobux.pdfIn PDF document text
    • https://site-1171987.mozfiles.com/files/1171987/mimidudotekaka.pdfIn PDF document text
    • https://site-1204510.mozfiles.com/files/1204510/hashta__gr_hashtag_generator_for_instagram.pdfIn PDF document text
    • https://site-1176767.mozfiles.com/files/1176767/73802370962.pdfIn PDF document text
    • https://cdn.sqhk.co/vudebalox/hcgiiab/pipenizufibimewadenasugu.pdfIn PDF document text
    • https://site-1212104.mozfiles.com/files/1212104/site_audit_pro_android_apk.pdfIn PDF document text
    • https://site-1246006.mozfiles.com/files/1246006/26258317988.pdfIn PDF document text
    • https://site-1178650.mozfiles.com/files/1178650/26810254783.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/resisuna/anthem_bcbs_prior_authorization_form_indiana.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/california_background_check_consent_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/factoring_trinomials_with_leading_coefficient_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/partnership_agreement_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/black_and_gold_wallpaper_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/abbyy_gz_format.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/bleacher_report_college_football_picks_week_6.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/bunker_hill_color_security_camera_95914_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/android_studio_comment_multiple_lines_shortcut.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/informant_5_review.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/94967832926.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_off0000e22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22E 5416 bytes
SHA-256: 00b483968658824d6ca50b4fa4b6bfb45c7555ddf1062e91460d93e46afed04c
font_01_sfnt_off0000f489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF489 10688 bytes
SHA-256: c8ac9b64643de24ed32ccb9465097ec94eee80d318c906f8a3e9b1e7923cb4e2

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