Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9de76bb4e0d1cd4…

MALICIOUS

PDF

72.0 KB Created: 2021-02-25 03:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 60d9d03c359cb8891e61aecf28b81c85 SHA-1: fc85b7691423993a8afec4582d77a0242746ec05 SHA-256: a9de76bb4e0d1cd4d23d7e6494a1cddcbf78a6f0f5486889f1a2b20aad0f77f9
186 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.
  • 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.
  • 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://bologen.ru/award?keyword=mbo+folder+training PDF link annotation
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/vesufasagefi.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/los_hijos_de_sanchez_vicente_leero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484154/normal_5fe85cf09db15.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/gcJifw8/76620735799.pdfIn PDF document text
    • https://cdn.sqhk.co/rukububibon/fmpeRZD/besesup.pdfIn PDF document text
    • https://wazumiwu.weebly.com/uploads/1/3/6/0/136038811/2159ee9.pdfIn PDF document text
    • https://bakadowo.weebly.com/uploads/1/3/1/3/131380427/nizosevapepex.pdfIn PDF document text
    • https://cdn.sqhk.co/tovasodoj/awqkgja/gefowupexejafetegi.pdfIn PDF document text
    • https://cdn.sqhk.co/somisafeg/jjv29HY/photogrid_video_pic_collage_maker_photo_editor.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/38968833195.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/second_grade_2nd_grade_measurement_worksheets.pdfIn PDF document text
    • https://dirotazu.weebly.com/uploads/1/3/1/0/131070105/rajokike-xanujowozexetez-vemawosokuxore-duweluwojo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wotidupodugi.myartsonline.com/figetuge.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_off0000dd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD17 5040 bytes
SHA-256: 48b428c1853202c8d3eee98e1f4dd04333fabeec1b7e0396d6f6366bca42e7a2
font_01_sfnt_off0000ee57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE57 10764 bytes
SHA-256: cd62201a3890f8374a38b2fbb5a5e49da3bd23b9b49cc593d92b4088a26ad0bd