Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40d5a681e072866…

MALICIOUS

PDF

75.8 KB Created: 2021-02-24 00:36:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 242794850f2178e1f3539eaae2974b8d SHA-1: a7268b3dede6a7b75d571b2f4afcd9830c78e9de SHA-256: b40d5a681e0728662f01d5afcedabf179ad077274e63d1d29a5bddb2bf52d1c7
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/123?utm_term=can+you+replace+a+fan+remote In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389797/normal_60322fda04b81.pdfIn PDF document text
    • http://teenagetutor.online/telescopic_banner_template1n01v.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/3520372.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/Jphege0/asphalt_nitro_for_pc_without_bluestacks.pdfIn PDF document text
    • https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/bf4b96a67e6dd1e.pdfIn PDF document text
    • https://cdn.sqhk.co/buwuvibija/jifhhtn/bamboo_paper_products.pdfIn PDF document text
    • https://nunodovov.weebly.com/uploads/1/3/1/3/131380210/2593854.pdfIn PDF document text
    • https://xuxijoma.weebly.com/uploads/1/3/3/9/133997678/8a372fe.pdfIn PDF document text
    • http://copriyghtconfirmed.com/after_effect_cs3_kuyhaacyvu5.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/hhidejj/tujebikuxafonafor.pdfIn PDF document text
    • http://poguwukobewale.22web.org/enl_property_annual_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469370/normal_603027ba11c94.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/dgeU3gj/woodworking_apron_woodcraft.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/7yWAs1S/76286365716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_602611658013f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fazodavevonexo.rf.gd/17633497030.pdfIn PDF document text
    • http://fulawumobolofog.epizy.com/zajelapunukem.pdfIn PDF document text
    • http://romulomejalu.rf.gd/bitijigisiluroz.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_off0000edac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAC 4988 bytes
SHA-256: 8e2104727054855d1662c22d5502476133ac01aea89220505f703b998d1f0cd3
font_01_sfnt_off0000fe99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE99 10368 bytes
SHA-256: 74b164529cd9eec601f923e65cf6a4e9bd4a2835c60c634bf5366ba90f8698d4