Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18085c898a8e36b…

MALICIOUS

PDF

70.5 KB Created: 2021-09-27 21:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: df33ec3bf8869603f5f4284e077edb81 SHA-1: eb001e5265619edb0d35b045753cc2bd8e50dcdd SHA-256: e18085c898a8e36bc5742aed4e2e420f002e7b1e1a38f328230f328c6998ac9c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to disposable hosting or compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://archism.ru/uplcv?utm_term=how+to+find+the+developer+options+in+android PDF link annotation
    • http://superazs.ru/images/news/file/dizavefazukoladiralukog.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/subosuretoburovonuf.pdfIn PDF document text
    • http://baove24h.info/upload/files/46887126514.pdfIn PDF document text
    • http://pioneerbuzz.net/userimages/sozerimuv.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/5758163808.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/13030538851.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210909161338.pdfIn PDF document text
    • https://tlkingatlan.hu/kepek/other/file/wogawejiwilikurudevap.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/18684863302.pdfIn PDF document text
    • http://ubest.ru/images/file/97213767326.pdfIn PDF document text
    • https://mimpi1pusat.com/contents/files/velivol.pdfIn PDF document text
    • http://www.fdconsult.qa/public/uploads/cms_files/gatomojilederomokugo.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16144cbb557ae4---31470644961.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/10/vadux.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/40950979766.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136bc0adb91e---seweferijalesokafoz.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/46169486833.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/14491845523.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/tanomijowuwutikatix.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161339d230f859---kojidel.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1f7340944---76293851087.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1632126229.pdfIn PDF document text
    • http://immopolignano.lu/images/karajaxibubadikevanena.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/tibimarejitigok.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_off0000b09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB09F 16828 bytes
SHA-256: ed96e5799decac06235edf6fa4abea7eb777b643f83bff3a01f503dfca8a9f5d
font_01_sfnt_off0000db6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 10740 bytes
SHA-256: 2bda0c2dc479fc97cdc763a133825cab0002255d2be6aa77bfee3790b66fb56e

Open this report in the interactive analyzer, or submit your own file for analysis.