Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd123385499a5d70…

MALICIOUS

PDF

75.3 KB Created: 2021-09-06 04:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fa3849bba6b1ef5a1f4021dd5b6d18fb SHA-1: 167930fce018099deb230ded96e5b93d2b16d811 SHA-256: cd123385499a5d700426234af5ec6f885c807c1aa97fa7ee78e922ace76a6382
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign or a distribution vector for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://coretry.ru/uplcv?utm_term=pm+kisan+mandhan+yojana+pdf PDF link annotation
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/2da48223f446106cfdd373e00e24a267/ripozovadikot.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/euiv827h7ov7ni46ulq2idh1s1/totoni.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/72341299285.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/58868493747.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/sesokugutunobe.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/dogoxizozal.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/witexiviruwerowurudi.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/28326582909.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612625094ae21---xonape.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc743ca908---vafezitefosebedewodegigu.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/tajulimunelesixo.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160945a052dd7b---poduliwubodetininet.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841976c6966---xaxikulumapikonu.pdfIn PDF document text
    • https://diamond-marketing.cz/soubory/82638675813.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16083dd644bc1f---mebadolevojofipas.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/b69327fa79d32cdfc0b908af9d3a21ec/45639532716.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/6eb3600c07af446f488bdc31e9a64061/visegokubelixo.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/99858343078.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf72444e88---fenexavijuz.pdfIn PDF document text
    • https://beruanglucu.com/contents//files/robuzi.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/75045504189.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833bab9ba83---sovutig.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/71067891934.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/eut46jkesvrd47riufetgc0ob2/97445061600.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_off0000bf55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF55 10724 bytes
SHA-256: cd08db48b36eb145e505a8c7935ccb77023c6e309ad6eca79c0595109d3485e3
font_01_sfnt_off0000d7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A8 18460 bytes
SHA-256: cc6806563fbc7cabe7d016e9f957533b31e5ec1320dfbb21ed107265fd430988
font_02_sfnt_off00010741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10741 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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