Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2433377b1eeb69…

MALICIOUS

PDF

78.6 KB Created: 2021-07-06 15:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 08c6355c60b90cea47513092241a15de SHA-1: e2f079c4c460091e32bc0edba7dffb37ba34a199 SHA-256: 8d2433377b1eeb695f83d8af7780d675ccf124761c0300606bc06e34eca4dc4a
156 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The PDF contains numerous external URIs and link farms, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or SEO manipulation scheme. No scripts were extracted, but the PDF structure itself facilitates redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/741bbee54a324beb7b80730ea9674ef8/pifamafuvawadesadixipotuw.pdf In PDF document text
    • http://ztkammer.at/uploads/file/tebakujudegag.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/givizadiwuroxav.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/66b67049d66ef14f5fec8951e4ce53f1/ginel.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/duruvutuwunafuf.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/bea3197cf99811aa1cc95555499ffbdc/sevaluvirumewifubodo.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/de70c00fcd1364fe3b398dd0dc5a466e/62854860443.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16085b0eb62384---wozilo.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f8f484e4bbfba2fb7de5941007fbe7d7/ridus.pdfIn PDF document text
    • http://deficanderel.org/clients/6/67/674a09facce11b7629d390eef9534ff9/File/damet.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/6cfdffe51c8e4e5ccd1dfc0b590ea81e/bogavogugipuxusu.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e73130950---pikakujon.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/resagowupekizarifu.pdfIn PDF document text
    • http://luyenthidhcanhsat.com/Images_upload/files/98922125622.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160986c1b41a37---fapepokulux.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/98431798830.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/97478935619.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/fphntjt2puo4sbktl8uad2l2g5/93550484999.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/90973672139.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c5a495f3b---xonesesevapixok.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/40611130161.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/08b5cc16050da4e2c98ae61c1e117ab3/ragavanopisaxe.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/tijuwagozu.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160801ad4398c2---31951352238.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/9235919441.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=rs+aggarwal+class+9th+maths+book+pdf+downloadPDF 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_off0000d01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE834 11372 bytes
SHA-256: 414719fedf201ef1ce4dd82712658569a813b44de256d9e83ca5be737ae799bc
font_02_sfnt_off00010280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10280 16392 bytes
SHA-256: be3301fde9d4b081910ca70f07af621601b0adf4ae051f2bbb447229051b1a5d

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