Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd03ac3465c9731c…

MALICIOUS

PDF

79.5 KB Created: 2021-09-10 11:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8cefc3855479ae2bbbe271204d21f34b SHA-1: dc52c384ccc8a2976ce18dcf773587ef8c3beee1 SHA-256: dd03ac3465c9731c6bca054f08544d23f0f5b707c9158ebf999f394f9f851d23
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The presence of a link farm with multiple disposable hosts and UTM parameters suggests a phishing or malware distribution attempt. The document body is unreadable, but the heuristics indicate a malicious PDF likely attempting to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://jgbt.us/pds/userfiles/files/34095565610.pdf In PDF document text
    • http://airconbank.com/upload/fckeditor/file/moxovikizokuvax.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161318038efb45---26569187466.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/xolepumitidawujewugabukax.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133df937f85a---22436705413.pdfIn PDF document text
    • http://vertex-decor.com/userfiles/file/ripumuwigifovogoj.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/15119210965.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/tavagex.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/39064037095.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/48197799679.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/71539969488.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/fegome.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/dimozugulivo.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/64833634944.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/zatudutit.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/73092988230.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/nuturikugedimel.pdfIn PDF document text
    • http://phuongdonggolf.vn/app/webroot/uploads/files/kiverumivanesuvugov.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/53387644543.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/38325480519.pdfIn PDF document text
    • http://kukdae.com/files/fckeditor/file/76387062532.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/39690689740.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/denedekitaju.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/suxiwilotabox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=telechargement+viber+pour+androidPDF 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_off0000cf51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE768 11064 bytes
SHA-256: c746e06300c269d1c38d660bd10c9c94a48c7ed50d668278534705c582aea260
font_02_sfnt_off00010086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10086 18968 bytes
SHA-256: 794b95abfa1ee6c03bd4b10a2667a6b94d11ee2f5547c3ed619b2aeb47db6c81

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