Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9bbb83031dcc36…

MALICIOUS

PDF

65.0 KB Created: 2021-09-05 16:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4e20ac7850fa5b01bef65eb29f65d440 SHA-1: 856560a8c94a0e5f6ba49be4fb7e7682e13d73be SHA-256: 4a9bbb83031dcc36f10b3cfa770a5c5d5a64b063bc43418a25b6e7f21b26e77c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as a malicious PDF by ClamAV and ML classifiers, indicating a phishing or trojan payload. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the attack pattern of using the document as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6379

Heuristics 5

  • 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
  • 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://queure.ru/uplcv?utm_term=central+cabinet+ministers+2019+pdf+in+telugu PDF link annotation
    • http://suliaok.com/v15/Upload/file/20219215295858.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/a04350c3db564051ccefe4153c592121/3367175297.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a6698311f---lixikorajemazes.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/radu8er4ifuhhf02q23o5k3mk9/46058632468.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/7a2cca4da91063e51bea69893329a82f/15729327867.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/5eadb8881d58555ceff035a91671e62b/4037864238.pdfIn PDF document text
    • http://hnatiukreunion.com/clients/b/b5/b5561851e3069b632e798ef7a1275556/File/fuvebifokodabavogaxexudew.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/25243065816.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16117b7e986440---57705971039.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/37d85a93840abe40387d152d5e7e9e52/pevokexofupom.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16071878b2384d---wagodosojos.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/17490820373.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/59620682442.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/derudinotegedajoxuw.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd205487b1---fapobajudo.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/81137910578.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/99d62aba6ff946bb491ce244b3dfac86/bitututoxatov.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/luvodajuw.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/lurodurebalabalibunamepas.pdfIn PDF document text
    • http://duythuc-bearing.vn/uploads/userfiles/file/24600650005.pdfIn PDF document text
    • https://whitesal.com/data/images/file/5964_20210526190702.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/20926856018.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/ajp76d5n3op7qs73p1jf10un0s/jajopijuxa.pdfIn PDF document text
    • http://vecsecity.info/editor_up/binomidibote.pdfIn PDF document text

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