Malicious PDF — malware analysis report

Static analysis result for SHA-256 89179292859498cc…

MALICIOUS

PDF

65.8 KB Created: 2021-02-12 05:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 4c39f18a72083ca4220774b18e4215d5 SHA-1: 11343fdf6853141f879ea900e9d3cf502b42796a SHA-256: 89179292859498cc0031987fa09250bac5c17b740c7846ae3b5a123854f69b6e
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://maypoin.ru/wb?keyword=learning%20english%20speaking%20and%20listening%20free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473410/normal_60255e4d7e786.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411219/normal_5fe4d3981fff3.pdfIn PDF document text
    • https://wenojuzak.weebly.com/uploads/1/3/4/2/134265903/dorivuneluxe-toxugimaxoz-dowopikimi.pdfIn PDF document text
    • http://jiwafuwik.22web.org/naruto_online_mobile_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_6018857621368.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487662/normal_5fe49b426a5b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449424/normal_5fd3cb1c6e4b1.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/mejados/de_videoder_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/faxejewutexajanota.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/dujarupog.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/10557510063.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/40240206670.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/jozopofuv.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/pinalaxuramoxiwamesi.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/resume_template_for_fresh_graduate_without_experience.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_off0000c3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3AF 5308 bytes
SHA-256: 06061032585c36e210f82395298d5860d68e9725a6a3211ea878bc6922196461
font_01_sfnt_off0000d5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BC 10660 bytes
SHA-256: bd2f503a0f685ffa05b1ae693dcbdc0f2025110ea7ea5c6fff9f2f66628bcb00