Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5cceeebfee75dbd…

MALICIOUS

PDF

86.2 KB Created: 2021-07-21 04:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: aeed2e272f9623dbc261a7668b8a1cb3 SHA-1: 2d5667799f12b7272d6858b53c0f57152a19104c SHA-256: e5cceeebfee75dbd4913a8478594c367b667d81b285ec6fe7f90e926e6a39713
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple compromised or disposable hosting sites. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest this PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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
  • 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://www.logistiekverbeteren.nl/ckfinder/userfiles/files/77855216742.pdf In PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/351e54c94552719f6d974c1d87c14a22/duninojodanojutasexoxuto.pdfIn PDF document text
    • http://grandinspirations.com/clients/75274/File/69221883467.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af59a713670---zimulonuxazu.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/952l0ekbkapmk2amoln1r3j7be/sobifivawisusas.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/pexogowezok.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a967e25a5d3---93830492958.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/lt2ruot0o7s7lk8o2uhn8pd4mq/46892840873.pdfIn PDF document text
    • http://poorclarescork.ie/images/fulididasaxipuxewefala.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/f089q0264dplnulfsdm8qnpp64/50294662854.pdfIn PDF document text
    • https://bbgpiti.com/userfiles/files/gasaxemokupudoxitafo.pdfIn PDF document text
    • https://rcot.org/userfiles/file/ladow.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/pekoxifidesitamusezol.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073ced6d0aa0---refevoretamapopulux.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c616bd083e8---23211109550.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/dawexarewomibomibagubugiz.pdfIn PDF document text
    • http://goref.ru/files/file/tebewajigemojasogupez.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/fd9955c59ea5ca0fbf78403161190900/pipep.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/xanimokemomokumabaniv.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/1a41d4b8ea9ed58605d6137dacbf2a5d/roriwizirorofafejinasi.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/gisufunuzojuruvetoro.pdfIn PDF document text
    • https://pasarantogeldua.com/contents//files/48796618813.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/lifus.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f158a39b1---limaruzipuzebevedijeri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=traffic+light+meaningPDF 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_off0000f04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04D 16804 bytes
SHA-256: 412647dfc2ec8f2d6e81160c95fb7d6adcbf703e6a66dcfb9ef241dfe9c21201
font_01_sfnt_off00011bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC1 10456 bytes
SHA-256: fc1e2d0a3762c6da9cedbcba89dd6cb0825591e66da61c0c7b0311bdf7a8c843
font_02_sfnt_off00013344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13344 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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