Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abe8794f63f27a4…

MALICIOUS

PDF

81.6 KB Created: 2021-09-19 09:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3967ac9d921d38ef01a5ceea4a64acb1 SHA-1: 4a53ead01c588cd9ad7eb18b1be9dd407e3b93e7 SHA-256: 4abe8794f63f27a405693c6b4261c4e4d043c0048e02fce8946e7a1608002319
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains a 'clipboard command execution lure', instructing the user to copy and paste content into a shell, which is a common technique for downloading and executing further stages of malware. The document also hosts numerous links on compromised or disposable domains, suggesting it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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
  • 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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0f0fcfba5---56996077752.pdf In PDF document text
    • http://uzks.hr/upload/datoteke/45525374284.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/36327027920.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/kamilibib.pdfIn PDF document text
    • http://giaphatmed.com/upload/file/ratatowerigadesenurito.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/1da29b0bf13cf8a2b0ddadc96b37b624/98863907854.pdfIn PDF document text
    • http://goref.ru/files/file/60050303588.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/17139631544.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/99910715737.pdfIn PDF document text
    • http://ktcyy.com/ckfinder/userfiles/files/gujaguxuvazi.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210917_55587C840A226D2D.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/22359398170.pdfIn PDF document text
    • http://catwalkexotique.com/userfiles/marodiguzunebexaz.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/fexemujaw.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/c28eqe1etj99jotuqi2ruuc5g2/42941407576.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/c7b998670d50d77757cddf43e5e7fdfc/97791552754.pdfIn PDF document text
    • https://jimsdelibrookhaven.com/demo/jimsdeli/admin/userfilesfile/16235219924.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/mizexajutig.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/musarixagikisubexarole.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/lekapuxomafexe.pdfIn PDF document text
    • http://dkkarsin.pl/img/upload/files/papanuram.pdfIn PDF document text
    • http://radecznica.pl/userfiles/file/96609562971.pdfIn PDF document text
    • http://geasit.it/userfiles/files/nupogekotewedojetanozir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=internet+download+manager+operating+systemPDF 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_off0000da46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA46 17404 bytes
SHA-256: eeea0f75c925f40df35511e7e069524d1f90f4e18d4b22f3a1ecadaf06f7a528
font_01_sfnt_off00010736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10736 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4D 10888 bytes
SHA-256: 826d300a39ca61af6ba4a431772f3bcfaa0c052e3c17ec7686f343e8e762da81

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