Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3b19d46995ca2d…

MALICIOUS

PDF

82.2 KB Created: 2021-09-08 07:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 13805c19f79b58a981e9e893d2a7b31d SHA-1: 0d51fa25cdd486d09c28a068a9050d4ba227bc38 SHA-256: 0b3b19d46995ca2d7f75c3f26baeacca4c5618396c31e8b647c2f757c75bec0d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded links are consistent with a phishing lure, likely intended to trick users into downloading further malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://chcial.ru/uplcv?utm_term=the+tattooist+of+auschwitz+by+heather+morris+pdf PDF link annotation
    • http://ratchadatitan.com/UserFiles/File/76757269777.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/qcnl51es2uhgmhm69jnk7pe6u0/87897859318.pdfIn PDF document text
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/46097900583.pdfIn PDF document text
    • http://onestep-tokyo.com/userfiles/file/92803458528.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/85641459102.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/3qv682dcfuoapppjo55umo1ds2/lakonalorugibonog.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/50003487815.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/khp1jrbk5useic070vtk5dkok1/bigenogemez.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0d7039715---tusenesibup.pdfIn PDF document text
    • http://www.klimavill.com/data/editorfile/zolegavelologolo.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/pulobo.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/202168131917.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16077ab49a71ac---81820292663.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/vuvofud.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/jiwufix.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608435b203eaf---36436734710.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/lutivemixazoxube.pdfIn PDF document text
    • https://thailonghoang.vn/upload/files/57140152852.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/34693bdbcf0c5a0d7585fd2a50a7572d/42865472735.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/cb4fb4e24fc78ac9e1fadb80f06071ee/busodefuwumu.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202108170829431499.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_off0000d9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F7 11196 bytes
SHA-256: 4fa84e4cfe1a544d1aacf5285b1f23aec428623c7c4b8925c60512b192720391
font_01_sfnt_off0000f425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF425 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C37 18124 bytes
SHA-256: 8dd4fc777a041e6811c21677427dbba9404e9e3e0631bde8a76ca5231b872315

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