Malicious PDF — malware analysis report

Static analysis result for SHA-256 98761f7b4aa837df…

MALICIOUS

PDF

80.8 KB Created: 2021-02-18 01:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 85a064a4df98a460dd6bb014bc4ceecb SHA-1: cef872d32f27983b60e12293feac4e9f68c8df05 SHA-256: 98761f7b4aa837df973f64fb843ff5c89e2d1d3d04e0c7d851a35245c8ca08e2
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=how%20to%20write%20a%20simple%20song In PDF document text
    • https://cdn.sqhk.co/gapevusa/gjhcrvF/health_and_fitness_tracker_bullet_journal.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/hgftijB/5937478729.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobovofuni.epizy.com/bodabexuv.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/badshah_movie_songs_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/eve_beginners_guide_to_hauling.pdfIn PDF document text
    • http://tamefizorala.epizy.com/practice_guidelines_hepatorenal_syndrome.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/possessive_nouns_worksheet_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/miwatibinubokapuv.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/kindergarten_coloring_worksheets_summer.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/transformers_the_last_knight_voices.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/pathfinder_cleric_spell_list_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/b._ed_exam_form_2019_last_date.pdfIn PDF document text
    • http://wuriwafu.epizy.com/gideon_s_trumpet_viewing_guide_answer_key.pdfIn PDF document text
    • http://wobirazegezuw.epizy.com/59785775369.pdfIn PDF document text
    • http://luvubarebefu.rf.gd/eating_attitudes_test_eat-26_italiano.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_off000100a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A2 5192 bytes
SHA-256: 7b74894fd405b81cb887889554b0eed812bb04774dc3e794ecf5aa5ea3d2e4ac
font_01_sfnt_off00011246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11246 10168 bytes
SHA-256: c6b45d343cf6ae52d67601bf605d8168b2e876ee3a663d4be6ec9fade9e9653b