Malicious PDF — malware analysis report

Static analysis result for SHA-256 be21da698d9ca291…

MALICIOUS

PDF

67.6 KB Created: 2021-02-28 12:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8db2b1f993890b4f208b4472c8cae09d SHA-1: 4f6a848aad5025829a2c74429a1c7427418bc9e1 SHA-256: be21da698d9ca291d37aa2feaa8292900690344cf16ea89cb601fb101d225f1a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/wix?keyword=ap+biology+reading+guide+answers+chapter+2 PDF link annotation
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/8234138.pdfIn PDF document text
    • http://walafim.22web.org/actiontec_router_mi424wr_firmware.pdfIn PDF document text
    • http://pakefuvinaput.22web.org/61949320182.pdfIn PDF document text
    • http://nopisodozig.66ghz.com/tosuletowawuxoxonizotun.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/fuxuwonivetabiraja.pdfIn PDF document text
    • http://mojamozegibobav.22web.org/69007943390.pdfIn PDF document text
    • https://zonujonuwug.weebly.com/uploads/1/3/4/3/134309714/5063775.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/xazarujokemus/70832985195.pdfIn PDF document text
    • http://bumevibil.epizy.com/how_to_use_the_breville_air_fryer.pdfIn PDF document text
    • http://latuwukatagowa.epizy.com/reference_worksheet_name_in_excel_vba.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/who_is_number_1_apex_predator_season_4.pdfIn PDF document text
    • http://muzokezebo.rf.gd/wanimojipugawuju.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/awards_and_honors_2018-_19.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/marketing_research_ppt_template.pdfIn PDF document text
    • http://rebokomixuxoj.epizy.com/87751539996.pdfIn PDF document text
    • http://pidukuniwid.epizy.com/free_cruise_flyer_template_word.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_off0000cb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB03 5788 bytes
SHA-256: 72fb86dcfb55f3a9342e03ee679e77ffb9cb86d253a2b2950ddfe5f7a2aee71e
font_01_sfnt_off0000dec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC7 10016 bytes
SHA-256: c27aeee523581b34124a22be2ac57a581934c01176c5e5170df1ada1eb84deb0