Malicious PDF — malware analysis report

Static analysis result for SHA-256 a04effcbf9aaef0b…

MALICIOUS

PDF

82.9 KB Created: 2021-09-03 16:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 669f267f579c73dbb648fa95a298f1c9 SHA-1: e600a8182b07edbe7f0837a0d0918867d5a1efee SHA-256: a04effcbf9aaef0b0a9c4d7190c5dd76d693383c08248132ff1efdf28b435295
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm pointing to compromised websites. The embedded URLs and the PDF structure suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://baptistfriends.org/media/13145802563.pdf In PDF document text
    • http://staresecurity.com/userfiles/file/rimisefagenitevapod.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/33519335831.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/18443727205.pdfIn PDF document text
    • http://orzo.cz/uploaded/files/pinip.pdfIn PDF document text
    • http://heureka-cz.eu/files/58850595807.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/23294392526.pdfIn PDF document text
    • https://cupanghitam.com/contents//files/nivosuzilituzu.pdfIn PDF document text
    • http://lagerunda.it/public/upload/file/17322145502.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/jovupu.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f304fcf73a---99751640632.pdfIn PDF document text
    • http://primehorseproperty.com/userfiles/files/sidajapat.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609130904a57f---sefinajozinujanuvelofebaz.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/74929455387.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/4648dfa2776c00d5cbf943f1239b3ff6/62574992017.pdfIn PDF document text
    • http://kingnature.ru/files/files/36778539595.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/o2g0n3h5j0o7n7taiscc16tjp3/46282339387.pdfIn PDF document text
    • https://a5productions.com/home/a5pro/public_html/ckfinder/userfiles/files/91721979229.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/e25c6b6bb8b54a9d68be42a163dd9e8b/23402099057.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/tewegiga.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/guq1a8in2ve7fumss2f10admer/14831116645.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/33922961047.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160906934ca212---zixijegow.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926abfa45e7---56965747249.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=software+project+management+pdf+for+mcaPDF 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_off0000e0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F5 16920 bytes
SHA-256: 889ef5e21210993cf2bafff4cd87d0bcb4f2d3115b4a85ce6c2f8776ba0ee9ea
font_02_sfnt_off0001245d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245D 10948 bytes
SHA-256: d95aa4dd92969cd1bea10be5278117fd463d2a948699c08e3776fb8b47341acd

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