Malicious PDF — malware analysis report

Static analysis result for SHA-256 595740b3d4045c68…

MALICIOUS

PDF

77.5 KB Created: 2021-09-18 22:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2678e3aedc08f536e302944e103431bc SHA-1: 498db9bda716a0f3c8df5798899691f2daa622b0 SHA-256: 595740b3d4045c6866e5c8b814f965163ed04be65761289c9d52604e3ebdd2f5
196 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution campaign. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to execute commands, a common tactic for downloading and running secondary payloads. The ML classifier and ClamAV detection strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://aihr-iadh.org/uploads/FCK_files/file/gubewigunarokagexebo.pdf In PDF document text
    • http://deaprogettazioni.it/userfiles/files/jizetorubobovovoxugegi.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/72451168286.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eace335e99---sinajinotubo.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/4437580976.pdfIn PDF document text
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/nuvufe.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/18534469418.pdfIn PDF document text
    • https://pmrmhss.com/userfiles/file/94640385515.pdfIn PDF document text
    • http://juditphotography.com/picture/userfiles/file/dexor.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/95527601183.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613169f2136d3---resemewotigunapu.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/84541355928.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/37272733211.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/d8e15bca42204149a0394943867514fb/61107451952.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/38312636767.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/vutidojizuguwokise.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/mesejonaxajisifig.pdfIn PDF document text
    • https://iqrainternationalschool.org/_assets/files/karadenesaluzaresigaxego.pdfIn PDF document text
    • https://vleek.com/uploads/files/levuged.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/28891817725.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161424567a600c---98298238364.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161405df160477---woranonefulotofogefof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=vlc+android+manualPDF 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_off0000ca95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AC 10200 bytes
SHA-256: e6331ab8d189532929d93d81376f78c76f4eb5417f201cb19d1bbc08f76086f5
font_02_sfnt_off0000f975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF975 17972 bytes
SHA-256: 063216979185b512b7a7e242a2a3ca447f84d5e524821a97047085228ef31d59

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