Malicious PDF — malware analysis report

Static analysis result for SHA-256 38781fa217d04406…

MALICIOUS

PDF

70.5 KB Created: 2021-02-27 15:07:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 15e400a9281b25c8c904c209976f6379 SHA-1: fe1e0aad167c9328fb68f8d55965121a7c5d66d4 SHA-256: 38781fa217d0440668726cdf9bf052d157f09770ca00db309c481abef1e449f0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/award?keyword=spay+and+neuter+clinic+gilbert+az PDF link annotation
    • https://cdn.sqhk.co/nokotadi/NicDsgi/12910773987.pdfIn PDF document text
    • https://wosutazewaxutu.weebly.com/uploads/1/3/0/7/130775331/b40f6b58f774cb.pdfIn PDF document text
    • https://cdn.sqhk.co/pofilese/4haicU2/top_speed_formula_car_racing_tracks.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428342/normal_5ffc2b1feb819.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/hxjcdgg/twitter_stock_today.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461751/normal_6019f23529236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485801/normal_6025e018cc08b.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/fodotobakovidejokida.pdfIn PDF document text
    • https://cdn.sqhk.co/gasalikuviz/cniaL6i/light_it_up_like_dynamite_lyrics_bts.pdfIn PDF document text
    • https://cdn.sqhk.co/bosesegivu/hic6fz7/25116023706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464313/normal_6031c4721ccc5.pdfIn PDF document text
    • https://cdn.sqhk.co/telivagawu/jcjhehc/gurixape.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/Kxdjajh/the_boiler_room_movie_netflix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481831/normal_60257acb0495f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pususarejopo.epizy.com/chronic_liver_disease_case_report.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_off0000d77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77E 5460 bytes
SHA-256: 5aa329690ef5d2637e4009b6da54572cf4e2b82b7081e3d80bd4ba484d435f32
font_01_sfnt_off0000ea25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 10300 bytes
SHA-256: 09410242b9dd6ed45df191641e9a570ce279d58adf38e8a1a97fb075c0a7ea18