Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf29ab188362637…

MALICIOUS

PDF

62.5 KB Created: 2021-02-15 03:08:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 98e3d7843ed9f34c98ae02d4cb779543 SHA-1: de5e3530dceeacad38233688667e1c78769c5fb6 SHA-256: 1cf29ab1883626372e9ca58ed51b847904fac4446d8f86de5bf8af8040bb3974
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://baarspo.ru/123?utm_term=how+to+reset+xfinity+remote PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378613/normal_5fe1ad34ed128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484632/normal_6027852e18704.pdfIn PDF document text
    • https://salogisamokowo.weebly.com/uploads/1/3/4/6/134649366/2248288.pdfIn PDF document text
    • http://tawojuxonivix.22web.org/nokia_powered_by_android_go_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxinugad/1V8iggf/lapelupolosevumedane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_6019b3e3b411f.pdfIn PDF document text
    • https://cdn.sqhk.co/satijumok/hhicCih/captions_for_instagram_post_for_girl_selfies.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486359/normal_600aa0d44ab4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489240/normal_5ffe7b207d2e7.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/ronenitevodo/70328607017.pdfIn PDF document text
    • http://vekagurose.rf.gd/universit_de_marseille_formation__distance.pdfIn PDF document text
    • http://xonezerimagu.rf.gd/english_spell_checker_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/sql_server_format_phone_number_function.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/64230146310.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/49459305498.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_off0000bac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC1 4892 bytes
SHA-256: 30fffb743c93f58cc7c0aaded4ca06523ab6709a618352565c74548ecf91dabb
font_01_sfnt_off0000cb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6C 10100 bytes
SHA-256: 0cb5b8ebf0ad135b6bb2819360f3f9f8660d6b5756275d9b5a0f50e97ff144ce