Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10bb17cd9526b06…

MALICIOUS

PDF

80.1 KB Created: 2021-09-21 06:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5cca2ee2e0bb930086ba4c99f73aa793 SHA-1: 6e7d9975c5c76d1a83701c55425778aa0c95aad7 SHA-256: e10bb17cd9526b06274fc4afff6f58e210c1666a62fe7836bbf8274651eed4c7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external PDF files, suggesting it acts as a lure or redirector. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm on disposable hosting, commonly used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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 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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614547db19fa2---40520168050.pdf In PDF document text
    • http://upakuika.com/img/file/3370153283.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/76551695525.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/wetove.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/19405027188.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/voxil.pdfIn PDF document text
    • https://ijaetis.org/ckfinder/userfiles/files/japijolol.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8a3e45dfb---kisesetorexamudatikazisi.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/25436747721.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/kogajegobixuwelofi.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/bosetogox.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/newujojibamegatox.pdfIn PDF document text
    • http://woykoff.hu/upload/file/66806251051.pdfIn PDF document text
    • http://lerucherdesanges.fr/userfiles/file/7384733345.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/wefidevifeb.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/7913062365.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/14546172585.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/58634974855.pdfIn PDF document text
    • https://www.institutvzdelavani.cz/files/54474910447.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/lovabononulelikam.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///98948534028.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/kavorojofalivavij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=complete+the+square+rational+only+calculatorPDF link annotation
    • 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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FB 11028 bytes
SHA-256: f52370d635adf7378bb0a871eaada9cfc9615b1a0ab22ae7976ca39bd97ec522
font_01_sfnt_off0000ec7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001048e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048E 17872 bytes
SHA-256: c814d62cfa5d5011430adaea593c0856dad4624a934acc4479235b3cc74ac591

Open this report in the interactive analyzer, or submit your own file for analysis.