Malicious PDF — malware analysis report

Static analysis result for SHA-256 14869063e414c2f4…

MALICIOUS

PDF

72.2 KB Created: 2021-09-27 05:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8843cba061016e6801df76accc51ac78 SHA-1: 5972536a06eb8f96f1114ccf1fd05d24f3d6e974 SHA-256: 14869063e414c2f48bcb893c2520602168c09f5884b538f4355b9f16f2abd338
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and flagged by an ML classifier. It contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The heuristics indicate the PDF acts as a link farm, directing users to numerous external URLs, one of which is `https://ketchas.ru/uplcv?utm_term=download+coco+full+movie+in+english+free`. This suggests the primary attack pattern is to lure users to potentially malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=download+coco+full+movie+in+english+free
    • http://www.culturehousesun.org/photos/file/nilowajanebiweg.pdf
    • http://okfilm.kr/userData/board/file/25815045487.pdf
    • https://ukmalayalamnews.com/userfiles/file/99282510014.pdf
    • http://aylincinarli.com/fckfiles/file/76286043748.pdf
    • https://smshealthcareservices.com/ckfinder/userfiles/files/31128805858.pdf
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/kisalotojimevazaweto.pdf
    • http://atel-j.nl/uploads/files/titisiloverikigilipor.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140eda76607e---sevemozovi.pdf
    • https://gornjastubica.hr/files/fururabifumupoguti.pdf
    • http://tcgardening.com/userfiles/file/2021092220460973499.pdf
    • https://nordiskvillaventilation.dk/userfiles/file/balanuvufofepolukobaxelo.pdf
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/92193020467.pdf
    • http://yuanhebiotech.com/upload/files/33764339508.pdf
    • http://vanprodukt.cz/UserFiles/File/vodeliwefosifuwabozos.pdf
    • http://abbuffalowings.com/uploads/files/munozafiregakub.pdf
    • http://classiccar-jp.com/js/upload/files/29780557885.pdf
    • http://blpest.com/UserFiles/file/97149590571.pdf
    • https://ehbo-oostkapelle.nl/userfiles/file/16955041600.pdf
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/85386531249.pdf
    • https://igescanada.com/ckfinder/userfiles/files/94463405550.pdf
    • https://299-45.com/CKEdit/upload/files/pofanodipa.pdf
    • http://9262895.ru/ckfinder/userfiles/files/gepulexawolapesenedu.pdf
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/8809739033.pdf
    • https://marugame.hk/editor_upload/file/54848698110.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b537.bin
67e3715b1a9956dca2c7217ad4049044dfa038761f663f2cf24a6bbf8b656bde		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB537 16784 bytes
font_01_sfnt_off0000dfa1.bin
aeddbe2ac9614e2bb98b472146dd6470dcc1646bf2de36e1b69415a23a70e769		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA1 11080 bytes
font_02_sfnt_off0000f913.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF913 16792 bytes

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