Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc3385c035629c8…

MALICIOUS

PDF

82.7 KB Created: 2021-09-19 14:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a8d7fdf1e75f52f15c17ca613ea4caf1 SHA-1: c7abd9a69e81746a8b85b6d6ceb78ce93619d3fa SHA-256: dfc3385c035629c83bfd274f990b743b6b79e465f84c3f1c43ad2e488c9d030f
184 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 compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://bangvetthuong.com/luutru/files/66168717282.pdf In PDF document text
    • http://imi.vc/upload/files/sebura.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/dopanebaronotewesopejux.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/30681199206.pdfIn PDF document text
    • http://kbautotech.com/board/datafiles/imagefile/54272446241.pdfIn PDF document text
    • http://dytac.hk/userfiles/warunajezepujanibupotopuk.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/t7nlbs1gcs9s0dcc8pv01p435o/53911886381.pdfIn PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/19516172371.pdfIn PDF document text
    • http://ingore.cn/upload/files/39665598656.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/pezava.pdfPDF link annotation
    • http://x04ydivan.ru/userfiles/file/17053355651.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/woliw.pdfIn PDF document text
    • https://cfacgroup.com/uploads/FCK_files/file/tiwupufarexuzudatu.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/32985955330.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1613aadbde2e7c---kexajiradawizosu.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de51417277---21883469656.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138975cab820---59489845720.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/fopumos.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/sageximumesatigafogax.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/40875601371.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/xofedefunusukuliwuxe.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3e8211958---39565470780.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/xekufotalelutoni.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161348cc351093---20384521983.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=enable+developer+mode+android+7PDF 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_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 10528 bytes
SHA-256: f69bb35785d65960d2a960b7c3d8db71a0008b88dd972f5689927cc2529d2792
font_01_sfnt_off0000f861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF861 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11073 17428 bytes
SHA-256: fbee571dfc4e8382e67bd5a190d27eb8ebae993e767e4e86c5136c25fb9e3f14

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