Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd34510f313083c0…

MALICIOUS

PDF

80.0 KB Created: 2021-08-19 17:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 868c93b142d60a8ba4024f466eae9379 SHA-1: 3423b9b4c49977e39d0a7a2c1cc62c88444a664e SHA-256: bd34510f313083c053e666756933f0f0f26d478f0a9dfba64e9adc60511c613d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure align with techniques used to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=reto+de+valientes+pelicula+completa+en+espa%C3%B1ol+latino+online+hd PDF link annotation
    • http://www.predia.cz/userfiles/file/tuvapojufixinuretixode.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/69698172570.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210627121348.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e4d0a2884---88521697677.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210518134538463.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/99319100918.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca263b1de2---voremegop.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/ec2b6c36f0a0910e08ba5663bf554978/latifudavog.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/34f5e375c5bbd60d8f0f7830ae54877b/54917541296.pdfIn PDF document text
    • http://chinatriage.com/ckfinder/userfiles/files/lapakanojekuxoditova.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/pivabulitixefonufije.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/d31052c6f78c7801e03cc3e6dd3a39e8/nevati.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/27119965177.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/43100801644.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/fdma0bv9m83rdi9oggon4qka64/90476954291.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/21102917236.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210725114120_lyayj0.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a76b27942b---vugewive.pdfIn PDF document text
    • https://pecsikult.hu/files/file/gabibezojex.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98e3d4bc2f---bidosadikimiviw.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/161192a90569ca---90497639286.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ac308295f---lifewirezotizim.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_off0000d0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E0 11096 bytes
SHA-256: c0b3a3805ee0223a54ac863fdcbcf2842dc816a8deb1bda2f1c4024090e06386
font_01_sfnt_off0000ea4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4E 17300 bytes
SHA-256: 5816960073ee7873f3c40472bedc133dd69cb96cd09ee33aa0f065e6d19489d7
font_02_sfnt_off00011655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11655 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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