Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeaf367fbe6a473c…

MALICIOUS

PDF

82.8 KB Created: 2021-10-05 19:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b8da812d219e57310e53f8f5b8f87817 SHA-1: 1f1023d3299a4bb3d97ed919c6d2315c499ebdec SHA-256: eeaf367fbe6a473ce1afb0ec18aaaa52707a8d9725ffe13f6d6a56fac0f07d98
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external links, many of which point to compromised websites or disposable hosting, suggesting a phishing or credential harvesting attempt. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses a pretext of urgency, such as account termination or a deadline, to prompt user interaction. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://westhollywood.ilovepokebar.com/uploads/files/gerefanutepuxawure.pdf In PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/gomusogivisem.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16145719eecad2---33268400302.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/pudodajakubes.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/nefuliwiwisizetas.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b92e6dd80---76085325649.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/b435gft8gojab8shao9ab03qf6/nagojiluxajepapitow.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1614b118bafa11---puwegos.pdfIn PDF document text
    • http://xsjsbzrw.com/uploads/files/zofatabolajuvitu.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/foronejubirubezifo.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/09112se8sf75babm4e3l91gsa6/furawol.pdfIn PDF document text
    • http://osingenieria.com/images/admin/file/tepazevidiliwet.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/72041495694.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/powerowereto.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/29374588025.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/wexogisovewisamugiv.pdfIn PDF document text
    • http://asia-test.informacittadino.net/media/files/82244278039.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-09-02/90d01d91a98cc34f01f677c14b65a4f6.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/9425387928.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/91106168789.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=passport+renewal+application+for+eligible+individualsPDF 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_off0000d673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD673 11188 bytes
SHA-256: 0077d60ef6099a551fc6450ee18a4cdb6fc833ecf1cdd06f7f4a8e570f2593d6
font_01_sfnt_off0000f072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF072 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10884 19448 bytes
SHA-256: 41bb177160abf3189718add500caa395255267e19efcf532a5673600c646d835

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