Malicious PDF — malware analysis report

Static analysis result for SHA-256 3832768a12792110…

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 09:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 354605005fe6dbf2000f402e2026282f SHA-1: ee28ba18380dc7f19c7a88871f5d3679e5cdef09 SHA-256: 3832768a127921105256a9d13cd28f5669b89c4f32cd85c466d57e139c65fda6
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample was flagged by a machine learning classifier and ClamAV as malicious. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a shell, a common technique for executing malicious commands. Multiple unknown URLs were extracted, suggesting a potential download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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
  • 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://fgcrubochi.com.ng/ckfinder/userfiles/files/diven.pdf In PDF document text
    • http://oishisushigd.com/uploads/files/19611734855.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gukilorifokefabajexepi.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/18993373747.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/tikib.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/5460279949.pdfIn PDF document text
    • http://appartementslisa.it/an3_Uploads/file/dobaminarajofuro.pdfIn PDF document text
    • http://timocomputer.cz/files/file/dajajekepofitu.pdfIn PDF document text
    • http://theflowermaker.com/uploads/File/65947360607.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161372acdcf70b---lafubikiseko.pdfIn PDF document text
    • https://noithathoaphat11.com/upload/files/piloxolo.pdfIn PDF document text
    • http://myphamvickwhitebeck.vn/luutru/files/gigelavutagi.pdfIn PDF document text
    • https://pecsikult.hu/files/file/53397170452.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/39587168129.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/visedenulafobamon.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/gafozikamuraxosodatavodi.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/63292408292.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/73166567701.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/kofitovabomu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+print+a+pdf+file+on+windows+10PDF 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_off0000dfab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAB 18092 bytes
SHA-256: 6375805fb1be2068fee54d75d0c3d4eb5b792e8278254e123a8bffcdc281fee3
font_01_sfnt_off00010e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12646 10744 bytes
SHA-256: a43dd91350a964bb55271e24519ea68ad8dcf3b2a1f1172b17794ee547fbde3d

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