Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe11a84fd6b3aacf…

MALICIOUS

PDF

86.1 KB Created: 2021-09-22 13:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 21bde1c19ddd02e3d5763de3343e48fa SHA-1: aacc75c3713e8a01a5949774ae152dbf01e14d79 SHA-256: fe11a84fd6b3aacfcd10a02fd49a21d974998b5950f01ab874e98c40130f2a55
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by ClamAV as a phishing trojan and contains embedded JavaScript. The 'SE_CLICKFIX' heuristic indicates that the document instructs the user to press Win+R or paste a command into a terminal, a common tactic to bypass macro restrictions and execute malicious code. The embedded JavaScript and numerous external links, some pointing to compromised CMS uploads, suggest the document is designed to lure the user into downloading and executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • 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 http://ideviceplus.be/app/webroot/files/userfiles/files/40669109452.pdf In PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4ad5dd58a---31546881747.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/puzimu.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/65021520984.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/bamexil.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/29821970025.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/88830246238.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/30752110030.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/23153935424.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210909_164814.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-20/20210920233009950286.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/161496ddad8b96---lekanowuvifokiku.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/54233718466.pdfIn PDF document text
    • https://jcmimoveis.com/userfiles/file/19055247572.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/kefarepigelisedumigabumus.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/71007176066.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16148feda259d0---9699075263.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/tadajefuzawajomujanuwego.pdfIn PDF document text
    • http://keyday.ru/files/files/xokinidabemil.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/61893919465.pdfIn PDF document text
    • http://fpole.ru/sadm_files/junugununupeluvi.pdfIn PDF document text
    • http://fatename.com/uploads/files/202109210007072379.pdfIn PDF document text
    • https://segurodegranizo.ar/noticias/fckeditor/file/69240763217.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/0a6c6cf774bb93536083cba8089ac05e/1455199275.pdfIn PDF document text
    • http://gcoekmr.org/cukashmir/User_Files/imagefile/lebipedomevo.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/nedulusazuso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=save+editor+ds3PDF 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_off0000eb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB77 18340 bytes
SHA-256: 00a94c7c56457735bfb4da4c5a7aaf272aaf0419b4b6411736c1961eedadf4b5
font_01_sfnt_off00011ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE0 10404 bytes
SHA-256: 7970c693cf5d978a4f972ddae5e93fc4e603546334c2c65e8bc328d615a109f6
font_02_sfnt_off00013294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13294 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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