Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2051441ea59ed62…

MALICIOUS

PDF

74.2 KB Created: 2021-02-23 12:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0aff4cc287bc7621a0bd4c1415e592a4 SHA-1: 364edc0b75a30155788f4f6811b01cbbefb677cd SHA-256: c2051441ea59ed62c76aa680050c4fd5349a12eef1cf9fe236608b9f6c73d6cb
244 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.
  • 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://crophysi.ru/wix?keyword=hb+800+bluetooth+user+manual In PDF document text
    • http://tilikeleboz.iblogger.org/57565808716.pdfIn PDF document text
    • http://dhl-order.info/html_form_space_between_label_and_fielddszlu.pdfIn PDF document text
    • http://kufozafonole.22web.org/lista_de_verbos_irregulares_en_ingles_en_pasado_simple_y_participio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386824/normal_5fcf09b225356.pdfIn PDF document text
    • https://xekexudaxojow.weebly.com/uploads/1/3/4/3/134365032/duwanovibazo-nomovupufe-bidotatodeti-vasamim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408701/normal_5fdd40c6bd654.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/asjcnjU/canaltech_mi_band_5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417033/normal_5fdadaedca1f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499935/normal_602d28d107f05.pdfIn PDF document text
    • http://raicen.com/the_young_persons_guide_to_the_orchestra_imslpfkcrh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388271/normal_5ffd110710638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460043/normal_60181bb181732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_6028fcee7e409.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://foraxevub.rf.gd/75197891712.pdfIn PDF document text
    • http://wijogural.epizy.com/minecraft_forge_1._13_windows_10.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_off0000e5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DC 5360 bytes
SHA-256: 8eb721c6ed53e0a33fd6ac7278d5b1683dc20b1ba9e9758dd56b9ccf14f0c567
font_01_sfnt_off0000f7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 10588 bytes
SHA-256: fe112bfce3c0de4dcb0206eda07e93d0841c89797b23ebfd5dacb2fd9c542c4c