Malicious PDF — malware analysis report

Static analysis result for SHA-256 11fff2464a0aedd1…

MALICIOUS

PDF

72.8 KB Created: 2021-02-22 06:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 972ed8c1ed5b1bc0012cf405615b7710 SHA-1: bbb8127cc0905284f84098e0e5a51b3436f5744d SHA-256: 11fff2464a0aedd1075f8e8b71ef8550f283292880cdef89dce5a1cee425876e
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=topic+6+bonding+answers In PDF document text
    • http://xefemile.22web.org/komelinalafuzipolonotu.pdfIn PDF document text
    • http://hookup682.site/80195729867gpotw.pdfIn PDF document text
    • https://lowunidedalovel.weebly.com/uploads/1/3/1/3/131380213/kevozejip_xelewax.pdfIn PDF document text
    • http://stepka2016.xyz/soldiers_inc_mobile_warfare_cheatsiio8w.pdfIn PDF document text
    • https://pizotiwedif.weebly.com/uploads/1/3/4/8/134868845/8528856.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/1hdgdO3/16075638941.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/hdiemvu/62668183595.pdfIn PDF document text
    • https://cdn.sqhk.co/mivufarowiwi/TSihgf6/lavifexadukurarakesine.pdfIn PDF document text
    • https://rubuvewoxuvima.weebly.com/uploads/1/3/4/8/134873715/7219024.pdfIn PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/nubodiledabuw_rumikifika_xekufelerebe.pdfIn PDF document text
    • https://pebuzifidam.weebly.com/uploads/1/3/2/8/132815752/tasevi.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/8jdgc3b/change_color_fill_layer_photoshop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dfe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE1 5544 bytes
SHA-256: d3cc9657fd0eb854a6dabbee3b7d75cfa3ae23d36e7a7aa4422371b45319ec79
font_01_sfnt_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 10416 bytes
SHA-256: 0594b39af0864036f8abd7e1fce72efa8a8fc4d8dedfac0cc0e5bfa687bef366