Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ced07883b93c03a…

MALICIOUS

PDF

73.6 KB Created: 2021-09-15 09:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 20b15460db82914a3b92f8026b553c5a SHA-1: c223a6a8a0a995e1017321d168f2158823f63948 SHA-256: 9ced07883b93c03a9b5457408dedb1a7872dce1e12be8d146c6ce303dffd7378
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to numerous suspicious domains, many of which are hosted on disposable or compromised platforms. The embedded URLs, such as 'https://coretry.ru/uplcv?utm_term=android+keyboard+superscript', are likely used to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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=android+keyboard+superscript PDF link annotation
    • http://qunjl.com/userfiles/files/fitewi.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/bapovilagabew.pdfIn PDF document text
    • http://hidramaco.com/files/files/zowewisawafaz.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/vupese.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/9897180113.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136c4e042275---22565070446.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/sodinolanotudokili.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/sajuxuwoxejumufovelafit.pdfIn PDF document text
    • http://elpijisystem.com/file/nebedamuxekatopat.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/98808251905.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/jikidex.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/50845397528.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a32467bbd0---xoxasewilebofinerasujaraj.pdfIn PDF document text
    • https://network-italia.com/file/21181324425.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/161353f235f178---57113414928.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/d7aa286ec159b3469189f4c6841fc876/63282703840.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614150aeceaca---wilumipapadevitova.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/bijimubol.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/dewuvomi.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210914042406.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/ranijavem.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/d1e770d312765095d5e2719ca7e57868/60404721840.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372d59690bb---37028871987.pdfIn PDF document text
    • http://coolscape.info/images/files/kemaxa.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/28475365398.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/giwijilami.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_off0000bcf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD508 16372 bytes
SHA-256: 921f0a0bde4c2a1bd489c8ee6c6c2a5059a8673db2daee1fdd8e0473236a0587
font_02_sfnt_off0000ff86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF86 10888 bytes
SHA-256: 02ec812a1d128404c7b6613609ba4d69669354f192dcb4675396ff2cafdff1a3

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