Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2808f5b752967d…

MALICIOUS

PDF

105.1 KB Created: 2021-08-08 18:32:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 629588cc2d5412b392e6e757063d5e01 SHA-1: de951a3e187b343ebc5682cdc6f38f7dd2e1d03b SHA-256: 9d2808f5b752967d4f69e60b4e1252883317241f82d4402d32df455cd9b5fd14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicative of a link farm used for phishing or malware distribution. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The embedded links suggest an attempt to redirect users to malicious sites, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9861

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 http://biotop-zamosc.pl/userfiles/file/xirifuw.pdf In PDF document text
    • https://securityguardsupply.org/php/uploads/file/69998041377.pdfIn PDF document text
    • https://vietspices.asia/uploads/files/wibujisi.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/37714959338.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/84870474215.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/27359945042.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/0843befff9b2add09a07ffc735c2fb40/19768667451.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/3e4dee7d7969cd6c1d81c155b3bd6695/14549680091.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/93819558743.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/qd69n5hcg89a9vr8gh0v4sjo16/mozakul.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/10fdb7a5671361bf49b7fa2076258779/subitop.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/292b3b02ce3150a7ede9ba5f0c2e2150/regogora.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/67965167757.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/4137f1441369a074e01f7c30e0305264/vivobubopamire.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/gezerufopipepamigutoni.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/25288141804.pdfIn PDF document text
    • http://pfmconsulting.org/survey/userfiles/files/pixadaf.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/l5neojesvvrsq5skdrfv8s5mqc/ganepatipiditegew.pdfIn PDF document text
    • http://www.bash.cl/media/file/fegulapikijipulikoteb.pdfIn PDF document text
    • https://wecareprogram.org/images/file/21351073746.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/nubivababubik.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/lovepagemedowa.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/jojurilarix.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/43743777753.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/28210448333.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084055d4387d---51300925352.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=the+penelopiad+pdfPDF 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_off00013728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13728 10192 bytes
SHA-256: 2456b339713c9aee700a12c9b74617615301c31e2b4c14a93f28dfd05ee1578b
font_01_sfnt_off00014dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD1 18340 bytes
SHA-256: d592bcf74909a6c254b6e4e57aa1a10e7307421e636a7b4d081936f18aa8ca73
font_02_sfnt_off00017d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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