Malicious PDF — malware analysis report

Static analysis result for SHA-256 55a575f06ad4c464…

MALICIOUS

PDF

81.2 KB Created: 2021-02-21 15:31:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 87a641432cb7f5cdab331f942ecd79ed SHA-1: c61b3506d8cfbf5da102e1847e5d19497f4a7f5e SHA-256: 55a575f06ad4c46438603e247661c32f9b4299ef51d1337e83ff7189c1fc06c4
194 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.
  • 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.
  • 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/wb?keyword=can%20you%20get%20a%20good%20workout%20on%20a%20recumbent%20bike In PDF document text
    • https://cdn.sqhk.co/dusaradezat/eFahfz6/25023268677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_5fd3297aae465.pdfIn PDF document text
    • https://cdn.sqhk.co/fowonawex/ZNhjgh6/geranelap.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/rdEiehj/cheat_seeds_for_minecraft_xbox_one.pdfIn PDF document text
    • http://mikrotikwizard.com/94510943695pvlmm.pdfIn PDF document text
    • http://girlita.space/game_of_thrones_bluray_free_downloadof9fo.pdfIn PDF document text
    • http://pristav.pro/21609738330bc6pp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470696/normal_5fd8a323c3e49.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/82060155377oobk5.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/bevarolimesale/the_greatest_showman_songs_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/37150484003.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/liberty_bin_sachivalay_clerk_book.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/fuvidi.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/jirewalexajopavuv.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/sexisegexelekipizeli.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_off000100fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FC 5352 bytes
SHA-256: a1b7a5df678480b7160565ca8d817f0f03e61e0e5ee0a76cea9f7a40623dfdab
font_01_sfnt_off0001133a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133A 10672 bytes
SHA-256: 81d6f78608faed76cfe5bf103339e643c1c7efbed7c7a4bd4a2a8869c6cc6b12