Malicious PDF — malware analysis report

Static analysis result for SHA-256 35cc43ce0b4ee20e…

MALICIOUS

PDF

84.8 KB Created: 2021-08-31 22:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3eeab4a15605289176d804ac5d260da0 SHA-1: 0325f8a49a8a9f82724d0099d456d776577206b9 SHA-256: 35cc43ce0b4ee20e8c0f90ee7ab968bfb71c75ae5be3d27c55df95fd8cf84c03
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to potentially compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure strongly suggest this PDF is used to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/rapifusebogibuvajuxufowez.pdf In PDF document text
    • http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/zumisuwimosumonemulanin.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/juxoxamobimopotemaje.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/o6ah4sednavioebcvgs0qdcpc3/18208627797.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/xujurixedebegoxexilogamat.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0ce544206---63131619535.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080b512764c6---dobubadefaxixamogu.pdfIn PDF document text
    • http://eventechsite.com/files/files/95208259748.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/jcadstdfo8imofapmhait06a72/5006244790.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075f6ed44a37---wosed.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/69995569262.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1612383321ffcb---virurekikowigimobuf.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/jalugegufetujudukomen.pdfIn PDF document text
    • http://tochalco.com/uploads/files/vuropowisaridagizevo.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/kogedaxinu.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/5038e86c663c0d31b64fdc59f6af0c56/batutiniga.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612729d7bc00a---6372736746.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/88101752848.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099a0963e2cf---ferufajonolevokilelaxelek.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/ruvulaxiwuleb.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62086898090.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/lixirumozuvukaveres.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/70660825488.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160843db9b376a---wigite.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848c7e3f0e6---bozepimor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=grilled+chicken+kabobs+with+vegetablesPDF link annotation
    • http://irodori.kir.jp/files/file/52097028366.pdfIn PDF document text
    • 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_off0000e4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D7 16964 bytes
SHA-256: 650e6d488d7fcebc448d86a93bdc34fe25c746d39a8f1639fd858a9d30f25932
font_01_sfnt_off000110fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FC 11072 bytes
SHA-256: 662f0baeff43ffec1f558c2389f8fde458d63eff463ce7ba1d8fb5ab96c7fd8e
font_02_sfnt_off00012a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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