Malicious PDF — malware analysis report

Static analysis result for SHA-256 7446b24932edf386…

MALICIOUS

PDF

77.8 KB Created: 2021-09-19 21:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 52d939aa320b82352d14cf25d590737f SHA-1: f739b2a39c662c10be589737f821d8dcb1cecbcd SHA-256: 7446b24932edf38661fd3cc26c5a7f0f7855c661e9b4b90075749b56950cf885
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the 'link farm' heuristic strongly indicate the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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=american+factory+streaming PDF link annotation
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/161407bc05c456---12078042306.pdfIn PDF document text
    • http://balaton.varosom.hu/userfiles/files/50736036525.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/mulamukabi.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/87518850321.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/fomanozogosevolagawewafi.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/21927636360.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/sarezobejaxadu.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/32305105140.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/jefonukuvezedejanavir.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/pokepiwona.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/5476935970.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd808ca285---12670265607.pdfIn PDF document text
    • https://er-cardiff.com/eurostyl/photos/file/51163417140.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/17650839396.pdfIn PDF document text
    • https://gres-k.cat/userfiles/file/42492491972.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/pogupedobudofomede.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/tizuxezukofugo.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/74127990236.pdfIn PDF document text
    • http://coca-colalife.eu/userfiles/file/woxezesixijegetubudarom.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/metibufovitujo.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_off0000c798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC798 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAF 10728 bytes
SHA-256: bf4f637bf4e6d50c0445eb307b1b8198ed4145de735b1a44c5036a8103ddaef3
font_02_sfnt_off0000f865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF865 18660 bytes
SHA-256: 53fd1e7084f262a72a9ab499c80136f571e27b9e05bb7378be57eb1b4cb7cdda

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