Malicious PDF — malware analysis report

Static analysis result for SHA-256 5701e3270666280b…

MALICIOUS

PDF

82.5 KB Created: 2021-09-04 04:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0324f1862391f605a19891288f0bcd73 SHA-1: 0f2f538c1e99dfbaeb6138b2c835855d1c17b7d2 SHA-256: 5701e3270666280b8c4a3f55bc69655a029f8687c06abcff937a08888a1c2a11
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. Several heuristics indicate the presence of link farms and compromised upload storage, suggesting an attempt to host or distribute malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

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
  • 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://eg-connect.com/uploads/editorfiles/file///60986779495.pdf In PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/wibekagibofusokuge.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9989bb2317---3560497645.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/29499862943.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9ec25a44a---wumosasoboburak.pdfIn PDF document text
    • http://perechen-jurnalov.ru/js/ckfinder/userfiles/files/pijurizasojatidijusewan.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/wavujajusafifexobosed.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6665c14fd---dematu.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/8876f1e057f79ade597b27d9bdf08300/gojup.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/doranakezujopodopakazo.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/b918602920deb6b1be20025f2e358c9b/nitulakadixererob.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/gepovafuf.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/62917727639.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/nuwinukoxeleg.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/5a2a19baabe1caa61c4c00b596062e13/bufidelekajigevumum.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160deda490657f---52143630295.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/lezirufisafifozokerar.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/waxukutelenumerexekak.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/1897f3899569d3fdcee42c3ebf1fdd9d/pazigibalofagukopufel.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021061701141373499.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/lefowifusijonalorupu.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/92690189730.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/jupademijanes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=multiplication+and+division+worksheets+for+grade+2+pdfPDF 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_off0000dbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 17444 bytes
SHA-256: b890cbd6951ec8b5cf46966470feee57b183701fbd136ee8aa340b6611d52f86
font_02_sfnt_off0001211c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211C 11356 bytes
SHA-256: 2a58086503f0314ead8845a72fa1832ad7c6e442a6b45f39571ec2b8f526d9fc