Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba4f4c7b474a5c7…

MALICIOUS

PDF

93.5 KB Created: 2021-10-09 03:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 0701c1ae9e1929a5343b18610941e173 SHA-1: 6f99ed70047302692b72eed720c650dc1aab7ac0 SHA-256: 6ba4f4c7b474a5c76c3b862d5f7cf0bfb7b06d7036fb6afd3c429d5954349c0d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The PDF document contains a 'ClickFix' social engineering lure, instructing the user to copy and paste commands into a terminal. This is a common technique to bypass macro restrictions and trick users into executing malicious code, likely to download a second-stage payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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://lbjgold.in/ckfinder/userfiles/files/wutapenusitanubu.pdf In PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/ugk6avo0c96r9tsmi3cfeqmasr/wimazisurorolipe.pdfIn PDF document text
    • https://netcsemege.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/8677017176.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/45672932925.pdfIn PDF document text
    • http://wenxuezj.com/images/File/wopakevarax.pdfIn PDF document text
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/topimojepen.pdfIn PDF document text
    • http://champagne-ardenne.annuaire-regional.com/ckfinder/userfiles/files/lofavikejiwaxuw.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614bdccf577fd---33930011668.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/pimupumeg.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/81921555206.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/teruviniw.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/zelewexufidata.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/cbvpv6ou4r1gr0aa2756mnm6cd/sifipafupe.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161420c64af60f---35844203321.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/tumewumoz.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/7465870655.pdfIn PDF document text
    • https://livermore.com/wysiwygfiles/file/mizijamimuzomorefoxorul.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/67297339876.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/xusepu.pdfIn PDF document text
    • http://rigosarchitects.gr/userfiles/file/77697914493.pdfIn PDF document text
    • http://montereypark.kopanramen.com/uploads/files/ravasobifozixibazaw.pdfIn PDF document text
    • https://chambres-a-la-ferme-plouzelambre.fr/userfiles/file/71539224132.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/tobopiwipupaxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=activate+windows+go+to+settings+to+activate+windows+remove+watermarkPDF 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_off0001003d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003D 10892 bytes
SHA-256: 766db8509d1fe7cfe96f81a93073fd14fee56285f63914073b30e42ce8099942
font_01_sfnt_off00011961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11961 20612 bytes
SHA-256: 6fbf3fe1ebfa23be4a974d858fdaed407ffd1dac85356f3939744ff92ebcb1a8
font_02_sfnt_off00014f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.