Malicious PDF — malware analysis report

Static analysis result for SHA-256 e803a3ea809fcb38…

MALICIOUS

PDF

91.3 KB Created: 2021-08-12 00:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: db38723562846abb2618d7763ef5767e SHA-1: a5c5e3d2d7e7afa42bdcf5c28b0c0909c176bdba SHA-256: e803a3ea809fcb38e97682b44b46bc21a4542853ced49cdf0f255b11343217d8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or are part of a link farm hosted on disposable domains. These elements suggest the PDF is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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=formula+molecular+de+acido+linoleico PDF link annotation
    • http://lacasedescaraibes.fr/file/bepokozo.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/zevoduzotuliw.pdfIn PDF document text
    • http://lagunarent.lt/ckfinder/userfiles/files/rekisotewefo.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/3593156522.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210603065402.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9074b5ba4a---78533944226.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/67d60f69fab7479d9a7ca1bf1449d413/89517589207.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/pepese.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/72151483385.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/f38be7e60bdba7298568c4818274c2ea/felefajewavelegotazoxujaw.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/vufamid.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9cddc4dce---29406236156.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2e1831a35---fuzokosudoxusudigi.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608404c9d817f---81986327308.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70210a92f5---20141466041.pdfIn PDF document text
    • http://imoroz.by/upload/file/50118379392.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83ece1ac9a---bajerekuwafalivagi.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210804023142113037450.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/ca271b4fe3a86adcbdb48830301cd5bc/mirodisaduraluxi.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbbe4016e0e---davezepubobak.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/72288281940.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/9ni08sjp0529u2u3dt81j27egn/falotolozutemivipafekiwi.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f9614c8bf---65288038638.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_off0000fd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001158f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158F 18832 bytes
SHA-256: 6ca09dd896704a2a167c39d4ea9c217f8c25ce356b08b93a5dc8e31b5c471519
font_02_sfnt_off000146ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146ED 10344 bytes
SHA-256: e61808c67e4e87da72bf1478420d92c699ad7b8ebd0c046b383c16351cd78516

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