Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb81395c10133bec…

MALICIOUS

PDF

85.4 KB Created: 2022-05-08 04:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-09
MD5: 3786fd824ca0d990211c50a450056d95 SHA-1: 128e17a7c688428c3945003eb8450f399035cf48 SHA-256: cb81395c10133becb3b403568cbdc7fcf16c69c79eeaf0bced51065ce8c7fd86
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://yubit.co.za/YmrXLWy8?keyword=soil%20dynamics%20and%20earthquake%20engineering%20pdf%20online%20test%20answers%20key PDF link annotation
    • https://xiliwawegumokap.weebly.com/uploads/1/3/4/0/134096460/fcd8a9.pdfIn PDF document text
    • https://www.pianoeg.de/admin/ckeditor/kcfinder/upload/files/tatuwagodewodoxotu.pdfIn PDF document text
    • https://stauber.lt/images/files/tomomipakonufedubebaw.pdfIn PDF document text
    • https://roletevuroza.weebly.com/uploads/1/3/4/3/134314330/noxeluf.pdfIn PDF document text
    • http://smartbazar.online/app/webroot/upload/files/kibutadevifig.pdfIn PDF document text
    • https://kizevopizimi.weebly.com/uploads/1/3/5/3/135351298/2998341.pdfIn PDF document text
    • https://rezopagukivuru.weebly.com/uploads/1/3/5/3/135307961/0adc42f939b0f.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/kamig-xogowaro-fevexivalebigif-mejogibume.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/zipirukokovufevizukorap.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/42135811645.pdfIn PDF document text
    • https://makorodes.weebly.com/uploads/1/3/4/8/134859701/nazavubuvigo.pdfIn PDF document text
    • https://nizodori.weebly.com/uploads/1/3/4/0/134000204/luxido.pdfIn PDF document text
    • https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/a8c0c1.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20220305060107_c9ir6p.pdfIn PDF document text
    • https://retusawo.weebly.com/uploads/1/4/1/5/141564870/0f64592b08241.pdfIn PDF document text
    • https://www.veskom-slovakia.sk/gfx/administration/js/ckeditor/kcfinder/upload/files/gadufesepekobamizetovo.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/wuvusavib_butufizafekope.pdfIn PDF document text
    • https://dekazorabo.weebly.com/uploads/1/4/1/3/141340288/jebajugufif-jematu-tifovof.pdfIn PDF document text
    • https://setojeduvesile.weebly.com/uploads/1/3/4/5/134587971/pexuz-piratid.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/vogazufomamewa.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/benuwuzux.pdfIn PDF document text
    • https://vanimiravupu.weebly.com/uploads/1/3/2/7/132710567/jesivabokomu-golole.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2022-2-20/20220220194707723863.pdfIn PDF document text
    • http://quimis.net/js/ckfinder/userfiles/files/gitakabuxepogafujifuw.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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0000e573.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000e573.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE573 11680 bytes
SHA-256: c74420cfb93032cc1a742437dd8daad578ed05fa46af844757f2bd0472759aeb
font_01_sfnt_off000100a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B5 16724 bytes
SHA-256: 5f43fc47c9a4f01268b2411a301573ddd2499f355371dc41a6ca5aadeb80f9ad