Malicious PDF — malware analysis report

Static analysis result for SHA-256 0432d2b90274eb4e…

MALICIOUS

PDF

76.3 KB Created: 2021-09-06 14:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cac2fb5d95aa758905bc2aa4e86f89f0 SHA-1: f3bc5c3417706051a712da8b779e257f83756fd1 SHA-256: 0432d2b90274eb4e73a74204991eba48e6d837b79f0266c4c56622f95a0492ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many of which are hosted on compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/b278afcddb917b2c3430d7dbe2a45619/72490237619.pdf In PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/c0997e9052a939ff43bb0c47b17c8d6e/kekojakerutupanolixa.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885017c5cbe---dofifomubapuzalit.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ce48931dd---62495739345.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/eabgpfh8c9g8hqlou2js9h3s2i/sorexulub.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/eo99hnbbub920vaa6b5qgkojma/91955326819.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021042820412573499.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/31381487910.pdfIn PDF document text
    • http://net-marketing.hu/images/files/37960035884.pdfIn PDF document text
    • http://cuakeobinhduong.com/upload/files/lugukar.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/378a4d7c59058aaed4e7321b5a84a914/pupebogizamugedaso.pdfIn PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/nujidedamasawitelewiwi.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160948e12b91b2---18030542246.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/37301862029.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/88169500088.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dcd0c5ebd---81373713068.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/fopakagagulovalazobum.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/5641322568.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/gefekazomipaxo.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/79545260841.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/c4c6df3e9ec4fc43dd3bdfde9d29cd38/30970657653.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783c0b88926---96413838525.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/d1f86e66964450789e8ae76982300521/dekinibimo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=pronoun+and+antecedent+worksheet+pdfPDF link annotation
    • 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_off0000c8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AC 16200 bytes
SHA-256: 6f583384f5061dc78d31b63bbff04c019f953cf621634aacd0bd59c42d5c36be
font_01_sfnt_off0000f22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22B 10860 bytes
SHA-256: 8c14199bc42878098da2c86219bb173153ca7cff4b03bff6b0c2f890c46a99d3
font_02_sfnt_off00010b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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