Malicious PDF — malware analysis report

Static analysis result for SHA-256 543e7dc5b0ee4c39…

MALICIOUS

PDF

63.8 KB Created: 2021-02-17 23:02:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5f8ead72656db7db6872bc6aef4037a0 SHA-1: da0c3b07747b0429dacc115d8736fea08986277b SHA-256: 543e7dc5b0ee4c392fabc3bc823de61a112bea436276febcf84241ad2a1d8db5
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=toro+snowblower+parts+canada In PDF document text
    • https://witojezig.weebly.com/uploads/1/3/0/7/130776148/761853.pdfIn PDF document text
    • http://rajenajodaf.iblogger.org/whirlpool_fridge_replace_filter_reset.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/does_burlington_coat_factory_have_formal_dresses.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/4Tshjgc/82285318949.pdfIn PDF document text
    • http://tofosasolamet.iblogger.org/lake_michigan_ice_fishing_guides.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixewawomito.epizy.com/66444500554.pdfIn PDF document text
    • http://jelasojeb.rf.gd/29669737863.pdfIn PDF document text
    • http://koxogulu.rf.gd/ncert_biology_book_class_11.pdfIn PDF document text
    • http://pofiwun.rf.gd/bulleya_sultan_instrumental_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/comptia_network_n10-_007_study_guide.pdfIn PDF document text
    • http://bojonovaja.rf.gd/american_english_vs_british_english_vocabulary_worksheets.pdfIn PDF document text
    • http://poxemibusap.epizy.com/mustache_template_array_index.pdfIn PDF document text
    • http://nupowabel.rf.gd/3d_print_object.pdfIn PDF document text
    • http://wolidile.rf.gd/ssc_chsl_descriptive_paper_format.pdfIn PDF document text
    • http://posewabenuxinot.epizy.com/google_play_services_free_and_install.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_off0000ba91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA91 5248 bytes
SHA-256: ae62737288222d2ef759174948c8205c66e362159598b6ae4b24cbf3fefbe21a
font_01_sfnt_off0000cc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7F 10664 bytes
SHA-256: e435916fe3dda0bf0cf9d5d0cc35e8018bbe40708212ab160afc03dd6588547d