Malicious PDF — malware analysis report

Static analysis result for SHA-256 69124c7f36fe4893…

MALICIOUS

PDF

87.7 KB Created: 2021-09-16 18:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b7023df080000c7313ad66337a0e9b6c SHA-1: 5fc8affb523a4c36a7c1bcde69d4cea11d8904c9 SHA-256: 69124c7f36fe4893b1d3b669072ceb1a33c008777f528b3de0def9dbf4a66b1f
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 external URIs and is flagged as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful websites. The presence of embedded URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://garglob.ru/uplcv?utm_term=after+we+collided+watch+free+movie PDF link annotation
    • https://ckmusicdesign.nl/userfiles/file/fivevinevuzi.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/52473476089.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/51555730310.pdfIn PDF document text
    • http://factorycontrolprojects.com/userfiles/file/dazamem.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210901142654.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/kodojuvonelusipekabaro.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/161373152bd5ac---jevedop.pdfIn PDF document text
    • http://noithatachau.vn/webroot/img/files/59419252552.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317893edb3a---ligubakolumalaseja.pdfIn PDF document text
    • https://krainaogrodow.eu/zdjecia/fck/file/91826104391.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/jeson.pdfIn PDF document text
    • https://factorysales.com/userfiles/files/46071430419.pdfIn PDF document text
    • http://agro-partner.com/Image/files/66728656110.pdfIn PDF document text
    • http://ifap.it/images/file/55786169355.pdfIn PDF document text
    • http://ilkjv.com/Images/Media/files/86310681532.pdfIn PDF document text
    • https://polnische-zaune.de/userfiles/file/bezowipixujabele.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/lapunizoxi.pdfIn PDF document text
    • https://kerryparsonsfoundation.org/media/file/99330721372.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/fidabim.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/rorarinonapuxup.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210903161939-91585116306.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_off0000f291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF291 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA8 10600 bytes
SHA-256: 49a142880b1880674fa57bbafb12b7bc7de789c4f70e14ae424b648efc8ec245
font_02_sfnt_off000122ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122ED 18404 bytes
SHA-256: 5f51b42eb0b7af5a93855db74d4b07b8c7bbaff480299b536127965023d9986c

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