Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eccdc5401ac8848…

MALICIOUS

PDF

79.3 KB Created: 2021-02-06 02:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7a09ef94054781ac61b8bcc860b41c38 SHA-1: 8e956c37b55daef5d1b65951d549689919acc4b3 SHA-256: 1eccdc5401ac8848352f77267ec86dacfad4551ec0c50e6bcd67e5e4fc8e614a
254 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
  • 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.
  • 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.
  • 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://yafferge.ru/wb?keyword=angle%20between%20two%20straight%20lines%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4488822/normal_600e656593e22.pdfIn PDF document text
    • https://tujuveduveb.weebly.com/uploads/1/3/1/8/131871390/ee233ac77dc.pdfIn PDF document text
    • https://patosalar.weebly.com/uploads/1/3/1/3/131384166/nikel_dumegerani.pdfIn PDF document text
    • http://chelamela.org/ashraf_ali_thanvi_contribution_in_psychologyaory8.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/gebufapivaxilof.pdfIn PDF document text
    • http://help-service-support.com/64515921966z07p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393511/normal_5fff48d0866c7.pdfIn PDF document text
    • https://vubenazago.weebly.com/uploads/1/3/4/3/134357699/lipasezudazivor.pdfIn PDF document text
    • http://ygrash.website/46976521590v53t4.pdfIn PDF document text
    • https://tanoviruxejalun.weebly.com/uploads/1/3/0/7/130775892/6b24ee1d57c58.pdfIn PDF document text
    • http://myfavoritesun.xyz/netflix_android_tv_box_not_compatible46b4c.pdfIn PDF document text
    • https://wodaxudufusan.weebly.com/uploads/1/3/0/8/130814186/6145338.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/vavabi/consonant_blends_worksheet_for_second_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/harbingers_android_tier_list.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/ebay_desktop_symbol.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/98664470113.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/vomoxotoxesupijuzuf.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/bemisal_movie_song_webmusic.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_off0000f7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FB 5524 bytes
SHA-256: cad7d5a0df90fffd28bcc616e58f89b11776a8d9e8dbe3146f87b772d9301ddb
font_01_sfnt_off00010ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACE 11024 bytes
SHA-256: 203b1c5e9a319c1837db47c894f286cca0679cd0622e4617992a9562b9fb6b97