Malicious PDF — malware analysis report

Static analysis result for SHA-256 73195c58b345ad0b…

MALICIOUS

PDF

89.1 KB Created: 2021-06-26 21:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d48348a99be6f3bdc2590f2d4471ca8 SHA-1: c360ebee06056aaaecc21d650e45d1cf638b0d10 SHA-256: 73195c58b345ad0b290781e3ed096ab774c4d98377afad750e40a7560da8aac3
164 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The presence of external URIs and link farms indicates a phishing or social engineering lure, likely to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/ftc0vpq7tqvucf0shu35efhk33/kalovujulexumefer.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/e4rdlpk6h5e16ptvva6mn259tp/15422482744.pdf
    • http://vincentpopetutoring.com/clients/d/dd/dd6b7bcf94cac99d3bed97cf8166637b/File/91311625755.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/55tv63kb4cspqat59g9leajukf/noxusosam.pdf
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/68196303286.pdf
    • http://suacona.com/clients/16856/File/lebafijux.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfed97db77---20033692557.pdf
    • http://www.rotudavid.com/ckfinder/userfiles/files/voziwarezufedaxomo.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/9b049856de45c40ed4d94bf7c2b7e628/90766194596.pdf
    • http://cornucopiafrederick.com/uploads/files/31363947364.pdf
    • http://jevades.com/aircraft/fckimages/file/zurixofonuxuseluxasu.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/021aa7a5329c5c03f6e390aa167d4184/vigupitiwubemirosubi.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/r63mfm2eku4ih15kj1jh44o73h/70242216588.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c1e6ba40a---welumekujafutabu.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/649c69dff1ee052e5d77a18bc2e07068/guvagudigatenope.pdf
    • http://x-site.by/upload/editor/files/97725916756.pdf
    • https://malabarmail.com/ckfinder/userfiles/files/35103068907.pdf
    • http://akinmedical.com/uploads/file/99346362717.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/0ed4960cd6fba96a05472243a8e662a4/11331964142.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075c3fb35b58---ranudewer.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099966bdc792---76464118747.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b486492d46a---vavarapekikexinofif.pdf
    • http://controldellaves.com/app/webroot/arxius/file/4802850269.pdf
    • http://bacvietexpress.com/upload/userfiles/files/wefefiwopusif.pdf
    • http://alexanderjamesbackcatalogue.com/userfiles/file/17088373472.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=sea+of+thieves+pc+free+download+full+version
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f547.bin
7152f3aa85b97fd9780735b58a0d4346bcec3c2212b92fa8c5a80c1a5a19d68f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF547 11044 bytes
font_01_sfnt_off00010efe.bin
6972a862d3e2724cc045b48c2dea79814dc43031225b2109dff54b9eee676498
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFE 17688 bytes
font_02_sfnt_off00013d31.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D31 16792 bytes