Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cabb38267a9c20e…

MALICIOUS

PDF

96.6 KB Created: 2021-09-09 10:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 97425780358650b26285b99fdda1b925 SHA-1: eaebd791db72cd4f1fe38a52f833b4f79bd59b7e SHA-256: 3cabb38267a9c20e37601fdeddc680b0a870204b7a85212520810f7fa9f4d223
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs pointing to a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malware. The presence of embedded JavaScript (T1059.007) suggests it may be used to facilitate the redirection or download process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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
  • 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.
  • 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://crewmak.ru/uplcv?utm_term=the+man+god+has+for+you+pdf+download PDF link annotation
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137f9e8039bd---wolonares.pdfIn PDF document text
    • http://panel2conso.com/userfiles/file/78021027520.pdfIn PDF document text
    • http://movediary.com/userfiles/file/naxuvikosadulatine.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/pinenipidananotu.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-7/20210907002650411120.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/lasibawepekisijewap.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/62893488088.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/vidavok.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/20892343544.pdfIn PDF document text
    • https://myagenda.myagenda.cz/pictures/editor/files/gagegofizobojevezotuvi.pdfIn PDF document text
    • http://sk-massimo.com/js/upload/files/mafifavovanasijelitijela.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/17927829196.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/70cd418302fdef4b64727e431912af3e/65573622658.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/44412071118.pdfIn PDF document text
    • http://prakseologia.eu/userfiles/file/8709964899.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/memip.pdfIn PDF document text
    • http://web5gstore.com/Files/files/61964938533.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/34028492796.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/14846586367.pdfIn PDF document text
    • http://parfumland.sk/upl/gabugemojuxunowomugedil.pdfIn PDF document text
    • https://profesa.net/userFilesfile/puruxogusevidodi.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/43191302026.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/14332220750.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_off00010ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBD 11016 bytes
SHA-256: a332ea5a9e0b674c70c41a78437b9819502b213f1242c0e15c32e505f069c21e
font_01_sfnt_off00012807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12807 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14019 20116 bytes
SHA-256: 4f82109aca8b5edc81f86e47eae43dbad6f5636fb523e13c0ac374caffbc2ef2

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