Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e67c9291cdc0ae9…

MALICIOUS

PDF

83.7 KB Created: 2021-09-01 16:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fcaaeb2aef9b9a74b8190c4f2bc61034 SHA-1: 8442fd4aa7e74a17cf6b7c8c039d3b64bec190d6 SHA-256: 6e67c9291cdc0ae9e1411f229989fd8ce7350157f476c7a5efef5f265ee9a53b
236 Risk Score

Malware Insights

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

This PDF document exhibits social engineering tactics, specifically a 'ClickFix' lure, instructing the user to copy and paste commands into a terminal. This is a common method to bypass macro restrictions and execute malicious code, likely a downloader for a second-stage payload. The presence of numerous links to compromised WordPress sites and disposable hosting further supports a malicious intent, aiming to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • 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://wastran.ru/uplcv?utm_term=windows+blue+screen+driver_irql_not_less_or_equal PDF link annotation
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/77744032904.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/crtied2bn32hc66e4soklvjh17/dogakifogulazuliso.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/k88437rspe9n82f6vubci5dp2q/keridi.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/8218941926.pdfIn PDF document text
    • http://gabortech.com/admin/file/19348754969.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a453b151664---gufekoganogojinakovaxo.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/32697290419.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/v3vhv5k3g1s72hei0m4sj8dndg/77791748668.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/59546221496.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/sojasuj.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/32693393463.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/2atjrdltdrhjipqiaru643r2e4/bejirakiwitozofov.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/pisetolinowodebosok.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c35321050a9---viraxaf.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a32ea8748---mibopumofidugumububine.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607de21d652f1---55121672541.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/venano.pdfIn PDF document text
    • https://anfauglir.com/images/file/92798036861.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/jrbiien3bb9pjmtapmsj3l5ar1/83584130660.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/fifagorozukebusidumolu.pdfIn PDF document text
    • http://jinyezi.cn/upload/50138059968.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fa3709008---mapufudofezufu.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/lamiteforexaso.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/giwigunizegigejexusofafiw.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a629e7a169---wikev.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210706003140986.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_off0000dfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAF 18216 bytes
SHA-256: 4bef5e252cdb3b26ec11532dbdf79e0e8a4767193305e9e8a54aa483c5b00c4e
font_01_sfnt_off00010e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7B 10928 bytes
SHA-256: 9a14bd15023968365fb74a5d808359f446cdad89cc23016cc4c4767bd841aa71
font_02_sfnt_off000127ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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