Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc61d7884c3d7c9c…

MALICIOUS

PDF

79.7 KB Created: 2021-09-20 06:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0d0b04a4f10ba037912909e68d23710f SHA-1: e232064ad7445d109e3268b0098a9a74679e747a SHA-256: fc61d7884c3d7c9c062f92dbea68f7f8699be2efc99f6d9af55d52e370e77e41
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also features a large number of external URIs, many of which are hosted on potentially disposable domains, indicating a likely phishing or redirection attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83119781318.pdf In PDF document text
    • http://savvyais.com/userfiles/file/52654195287.pdfIn PDF document text
    • http://christopherdallo.com/file/tavoveniwilutikan.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/dujabopesenesef.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/59421906697.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/nazimivo.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/88550050110.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614368fa6d145---fukavowopulavilimakufajir.pdfIn PDF document text
    • https://kocarbonag.com/luutru/files/47281418850.pdfIn PDF document text
    • https://noddy.nu/images/file/wimewolinura.pdfIn PDF document text
    • https://mangallagn.com/images/file/sifabonon.pdfIn PDF document text
    • https://sleepthai.com/piceditor/file/sutofulazonoverirekezonij.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/jituvekelu.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/wudavobolud.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/161449966aebfc---lesewivupeli.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/wudufixasaso.pdfIn PDF document text
    • http://yhbinternational.com/userfiles/file/31523796267.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/masikavojofivikoze.pdfIn PDF document text
    • http://sky1981.com/asset/uploads/files/74737714665.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/vudorupisuxodali.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/88369677617.pdfIn PDF document text
    • https://stoneappeal.in/FCKeditor/file/zojorujoja.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/nipolakekaxuvo.pdfIn PDF document text
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/83111290575.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=dutch+plaits+step+by+stepPDF 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_off0000d358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD358 10500 bytes
SHA-256: 27f84fd5f74abf662f8b48c23c6b494fae7dab4b02abcdb467074af630ced624
font_01_sfnt_off0000eb3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3A 17600 bytes
SHA-256: aa7476e8e31f55dab319e995ed606b16839a3b0ad38478229280590328ed569f
font_02_sfnt_off00011915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11915 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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