Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11bbe7af6b7f659…

MALICIOUS

PDF

69.6 KB Created: 2021-09-24 15:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eb890ed0f3330d1230274056dab3fb22 SHA-1: 8a80a9c1dad59d47964849a70382871dcf70f4c6 SHA-256: d11bbe7af6b7f6590d43896ca94001c3a4910e3cef12c984cbc74e882d0a3ed3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is a link farm hosted on disposable domains, and numerous external URIs were extracted, pointing to potentially malicious websites. The presence of embedded URLs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 https://crysiq.ru/uplcv?utm_term=the+interview+movie+live+stream PDF link annotation
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/57602644703.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16133f6e36be11---zakubigaluxixapafutewiwin.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/81861132162.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/dojitubenij.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/fesokofajijosuvevipe.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/zesidunumoxixodap.pdfIn PDF document text
    • https://ccichn.vn/data/upload/file/burorivujopujolegotizu.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/dexoboresarabazuwulezo.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/36879339484.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/49901950752.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/nazisixiwiridaj.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/talogeta.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/16019305555.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/fusife.pdfIn PDF document text
    • https://onlinendttraining.com/files/gevubimesenorurubitomaxa.pdfIn PDF document text
    • https://rjpexport.com/files/53676116337.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/11820895445.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/91364847205.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16142357aaa862---8240815610.pdfIn PDF document text
    • http://epplast.com/files/file/91552820540.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 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_off0000ab56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB56 17956 bytes
SHA-256: dc5190847715c73e6d276cac79c35be151e6972681c158259a39d49b81b895c6
font_01_sfnt_off0000d7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E5 10488 bytes
SHA-256: 7e452b391eb7f384061676a2768d36185b883d252e668919f6f7618e38232e55
font_02_sfnt_off0000efa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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