Malicious PDF — malware analysis report

Static analysis result for SHA-256 348e1d9d0699fb7a…

MALICIOUS

PDF

69.1 KB Created: 2021-10-03 04:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0146c68dd7fdc2a9d99040edc3b38197 SHA-1: 81d055efff2a0807055811810f4984a11be220e7 SHA-256: 348e1d9d0699fb7a5ddaddab9097e41296db32a1fb973c5477ca7b1d0c87e31b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to redirect the user to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://geyikkimya.com/userfiles/upload/file/75421014297.pdf In PDF document text
    • http://24cvety.ru/upload/files/jumigiwiputatano.pdfIn PDF document text
    • https://blugarden.eu/file/sozesam.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144487826cdc---xesogenojiwamizojowis.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153776e919a3---ladaro.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/25321577403.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/bapemes.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/f0b9b1583998d1500d5fdd9fc82fd2a0/27864216255.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/rubajozaseloxaramufogulam.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/47540039976.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccaaf2eec0---julor.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/pefupebuzejiwabobo.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/42036850019.pdfIn PDF document text
    • http://seritour.com/rsm/files/zoxajesesebawijoxuke.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/lexisaxazo.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/sidupedasafilovam.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/pirarimigipiv.pdfIn PDF document text
    • https://sergiomauri.com/images/file/naxufumizimos.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/zozewiwosigadadezibani.pdfIn PDF document text
    • http://mylivediamondinventory.com/uploads/files/89694201281.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/vigovodinizonavanerovugi.pdfIn PDF document text
    • https://trainova.com/userfiles/file/tagagefusikivizikusukujir.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/30nnprkisku833879j04npdrl3/15089618930.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/tegojake.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=c%23+httpclient+basic+authentication+examplePDF 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_off0000b039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB039 16644 bytes
SHA-256: b8b4f55475094f854b5c971b3d004d60af38db359b09969043f6164889b03b0e
font_01_sfnt_off0000db25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB25 9104 bytes
SHA-256: fe4a9ad32d6d12da45ce8861a1e6e511df5579fd33367a5c4d1c9e774d301804
font_02_sfnt_off0000edf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1