Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b92c1c0ee40178…

MALICIOUS

PDF

79.1 KB Created: 2021-09-11 15:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b7f26073f64517000f31675beecb8bb8 SHA-1: 75b28b1a6bc35aa5ab00da8a96a4bce03bcbaf38 SHA-256: 67b92c1c0ee4017838d15f487172b5a867627e583006ead8083e96c8817b6cfa
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript (T1059.007) further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://email-database.info/userfiles/file/govesugofifujiva.pdf In PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135159b08692---foxazukujonuvaditokebo.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/kowemuredofusulagumesi.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/96839161137.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/pipokatijamug.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/91419411442.pdfIn PDF document text
    • https://centaur.vri.cz/docs/files/58530914540.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/2763110082.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/18125458184.pdfIn PDF document text
    • http://unewstoday.com/task/userimages/file/kanosapugokow.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdb256561e---84376508578.pdfIn PDF document text
    • https://matraci.info/UserFiles/File/90913797475.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/58863743906.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/vegak.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/fariwamedisolomizolid.pdfIn PDF document text
    • http://hotspot-usa.com/js/upload/files/49262051094.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/kodowuveg.pdfIn PDF document text
    • https://wangwangcamp.com/uploads/files/202109082207336082.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/38230724880.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/gimupasuxaresejovunotum.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/betufalatedowuvekorok.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/84916801910.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/88281690108.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=movierulz+sultan+downloadPDF 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_off0000cf46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF46 10544 bytes
SHA-256: 9edee93212955d9c13a4b771e8aaaf928777e109061ce05d77a73c8868b7cb6a
font_01_sfnt_off0000e78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA1 17360 bytes
SHA-256: 295201281289ff101088493cebd63ab2e2dd3d60705f3953a02567a4b552b7b1

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