Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3183ab68c066d93…

MALICIOUS

PDF

73.7 KB Created: 2021-06-18 03:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fc3dacde54ef4f2fedad35e26f61f8c5 SHA-1: 9eac573dbe20502ff7db6d9d666ec0e1ee73d71e SHA-256: b3183ab68c066d93317858e7ca0a6e90710648fcfbd8563a17815a5441b3987f
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised CMS uploads and disposable hosting, disguised as a guide for connecting a Chromecast to Wi-Fi. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs and link farm structure are indicative of a phishing or redirection attack.

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://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/cce25dca1a20c7b2e0c97e0c0cf1db8e/jegisufenefixugelowefuba.pdf In PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af7aa90916d---58584808491.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/82203332680.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/buburuwafalefutasa.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bb77beb254d---remifuguforesarezane.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/68938381402.pdfIn PDF document text
    • http://highlandlynxotic.com/clients/7/73/73cf6ae24f8ea70eb1cbac1dff6b0f9e/File/semazapi.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/09n6lf2r9g4k8k5q727nhuqq0m/53062116703.pdfIn PDF document text
    • https://nada70.org/userfiles/file/77967015404.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16072a2f8301de---83146783654.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072f6c0d8edd---54368386562.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/milajetuxadekeduxodidobox.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/roraxafigazikuzerijat.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/dccgoi793me72aintnamk7d7ma/11533096931.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+connect+chromecast+to+wifi+networkPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD785 4992 bytes
SHA-256: 281f335664b4c21f41e4a7147d73ddd3cfd290e15defc8b9f9c1aa896bde4b30
font_01_sfnt_off0000e84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84B 10396 bytes
SHA-256: 250bb82a41eccf95e6b8fe3de640728ab166a6c57639fd3e396f27e7603ee967
font_02_sfnt_off00010bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361