Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5489439d22683e…

MALICIOUS

PDF

64.8 KB Created: 2021-02-18 16:59:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d5287e6810660e2200b69cf659c5a9d2 SHA-1: 704523ad55092517d33798baaa7a5fdd2db783af SHA-256: 8b5489439d22683eab11cd18abee1c64b59f0b6652cd6e5d23c442feab9b0001
136 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
  • 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.
  • 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://baarspo.ru/wb?keyword=possessive%20pronoun%20worksheet%20grade%202%20pdf PDF link annotation
    • http://moresukko.ru/the_great_acting_teachers_and_theirjqmlf.pdfIn PDF document text
    • http://btsworld.org/factoring_greatest_common_factor_worksheet_answers0h5iu.pdfIn PDF document text
    • http://7evenrp.ru/vk_40k_codexx5o3f.pdfIn PDF document text
    • http://cyberghost.store/norbekov_eye_exercises700zg.pdfIn PDF document text
    • http://amaryllis.space/velifatuwevisowufijogozighq6z.pdfIn PDF document text
    • http://filanion.online/92889033201ud9e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453560/normal_5fcf9e2f2930f.pdfIn PDF document text
    • http://antileqphh.site/safodoviwilabexezidoncxqx7.pdfIn PDF document text
    • http://kdghy.online/portable_vmware_playeru05hj.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/pevarijidasalop/bootstrap_form-_control_select_placeholder.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/chocolatier_game_full_version_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/kerixitewobujogotinewu.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/9255966260.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/ultrasound_scan_report_boy.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/crepe_paper_flower_templates_free.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_off0000bef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF2 5620 bytes
SHA-256: 822e940fa031e56abed692ce095b4ae4398a77dc6747cc671f7a411e94d6a2a0
font_01_sfnt_off0000d22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22D 10632 bytes
SHA-256: dd94b5a6a4a5e73be2b158dcd931cd0a34abd1266390ddd770ff95b8b5b14b45