Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba2b7417b949a47…

MALICIOUS

PDF

72.1 KB Created: 2021-03-01 23:14:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e1eeabc36dbd13cc4f3d1e705b4e1175 SHA-1: 655bfc88dbcdeab89f21e643a4f268384726386e SHA-256: dba2b7417b949a4718a27416adf50162e4dc1efe04f3197499e7574485b446cd
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/award?keyword=hotsy+pressure+washer+parts+breakdown In PDF document text
    • http://wivuperafuzo.mypressonline.com/30234673877.pdfIn PDF document text
    • https://muzaromiv.weebly.com/uploads/1/3/4/3/134380281/febasabijinap.pdfIn PDF document text
    • http://wiinorama.website/vw_service_centre_menlyndlbat.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/95440778335.pdfIn PDF document text
    • https://pegutezupo.weebly.com/uploads/1/3/2/7/132740329/9501829.pdfIn PDF document text
    • http://elerctum.org/jamabika1u0ax.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/buzokiva.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/bthgqgd/74485044076.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bitugoxopezuwu.rf.gd/bugozaxejijizojugalagepu.pdfIn PDF document text
    • http://bakotege.rf.gd/maxadafilesebavazavawife.pdfIn PDF document text
    • http://bifakafuwal.rf.gd/27089323800.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_off0000df33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF33 5376 bytes
SHA-256: 05281ce85f72ee19784e203726c12b2a63b65ba0bc0edb9b8ff1144d37ef5343
font_01_sfnt_off0000f183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF183 10084 bytes
SHA-256: c9f0c9d03ab84ce6c872528dc514b1db0e8577f35811831b5242bbf78e1e4d67