Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e6c803cca6870e…

MALICIOUS

PDF

82.4 KB Created: 2021-09-19 00:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0332e1ed5d0c3de3f29ae97d412a2c98 SHA-1: 20ef430b60fc697fda661131268765b556751baf SHA-256: e0e6c803cca6870e58571d24686c230ea877e3dc8d483c81a4f206940b3e8764
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many hosted on compromised or disposable domains, indicating a phishing or spam lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://drafthe.ru/uplcv?utm_term=apa+format+7th+edition+citation PDF link annotation
    • https://ferdavagnar.is/images/fck/file/satutatolele.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/36515859409.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/sogivodulomabu.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/0aomemo9pkb4au0kmsptag64vu/ponipagozudabawulewozoze.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d733bd9ef1---lumofirotopuxejo.pdfIn PDF document text
    • http://ladna.pl/user_images/file/59837968627.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/72695627795.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109121946428771.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/kakanimamil.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/27698713585.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/69380633315.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/58025783980.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202193_41216_785.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/65743646345.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/67512669050.pdfIn PDF document text
    • http://vibrator4you.cz/UserFiles/File/48557602152.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/pijifavorilorawep.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/22045528032.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/21471706930.pdfIn PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/19104147426.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/93844a7b7c7f4a4bcf9aaf6c8c9521db/fegekabes.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b63c3d5c87---gexuvogurozi.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/ginunotapuwugovubevex.pdfIn PDF document text
    • http://unibox.lv/files/text/94105898748.pdfIn PDF document text
    • 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_off0000dc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 10700 bytes
SHA-256: 9c304eaf93b92d87fc2cc0c86793d57f7268e5522f7687df99c99a66eadf0a32
font_02_sfnt_off00010cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD3 18164 bytes
SHA-256: 8e47fcd3ed1bca7616a98aef6beee8442699f15dc83b8bc25259825d66b8c2eb

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