Malicious PDF — malware analysis report

Static analysis result for SHA-256 3029dfb46a916bdb…

MALICIOUS

PDF

96.1 KB Created: 2021-06-15 23:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: efb796c6ca84b46327af3e28add46402 SHA-1: 192c190a01ff96383c3f88410dfd83f3b6a13c00 SHA-256: 3029dfb46a916bdb65702f24a303bf12ad78997c87909a4378ca4cb0882922c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme, likely leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crysiq.ru/uplcv?utm_term=dissendium+spell+meaning PDF link annotation
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb0aa28b20---37795941950.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/67406601332.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1d873a9a6---koxobaxidax.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/vitonuxubifawajuma.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/617b423426379c320f1dd8385bc4e248/51623098303.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca1b140544---luxeliditixudi.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/bqe2kbh5fm68tkhpsqip3j6mm5/nexesipimupopetipobozakud.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/34523835549.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075aee9f051e---vilibeba.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/60ad436e1ba8e2eb9e785e76dbed6a6e/fimon.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a04dbdac9---54152322498.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0f9e08903---70513548947.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/71467175716.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091571d38dfb---28580234756.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/be05652a753fc0ca86a8e7d812424913/dikifisudurugu.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608993b0790ed---80108033883.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DEA 5180 bytes
SHA-256: 6ad7b6088fa6712f0338dda7ad013d80a39f8b6b5df022cca250f53f6975bb36
font_01_sfnt_off00014f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F7F 10684 bytes
SHA-256: 326149b8edfe7de544add46785ac57dd912fd31387cd353271abfee5855976da