Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7cad2eeb33a1cc1…

MALICIOUS

PDF

85.8 KB Created: 2021-09-24 08:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3b402373aaded4f7bb0ab4f971af5add SHA-1: d70e5e727b33da9c1448adbec570fe7ac6a7d3cf SHA-256: b7cad2eeb33a1cc16c73e28b777ccbe3f246409e4b1798197f60113d03b931f3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a second-stage payload via the linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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://heuresromantiques.com/upload/files/taxevozaxefujir.pdf In PDF document text
    • http://cupta.org/userfiles/files/20210924122917.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/82250474468.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e8c98bc71---tamuxi.pdfIn PDF document text
    • http://lucidarepavimentimarmogenovaealessandria.it/userfiles/files/rivikodejipufi.pdfIn PDF document text
    • http://celesteandtorsten.wedding/images/file/vejuxobuwediwiwirawu.pdfIn PDF document text
    • http://amsuatrust.org/survey/userfiles/files/xizunepoxataval.pdfIn PDF document text
    • http://www.vnos.vn/app/webroot/uploads/files/1334926249.pdfIn PDF document text
    • http://xtra360.net/campannas/file/92334076474.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/zekaxo.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/jomegafezawefawudivop.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/79911200636.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a19bb2d7a---zuwuxojexatijolexo.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614d4c8b3ca97---98400125063.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/fuxalodetog.pdfIn PDF document text
    • http://hzqljsj.com/images/upload/File/nomomidiwuwi.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/pumoli.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/rakudobomopadarixo.pdfIn PDF document text
    • https://gestionarival.com/userfiles/file/1495069766.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/lawaxojozenejekajut.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/busaniwije.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/guvogikuxigedomujikifile.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9bebc57cd---lewitedudibufakinowaku.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/17876065684.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/86052418662.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=assasin+creed+3+apkPDF 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_off0000e880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE880 10488 bytes
SHA-256: 50b464920753e5ef410005b9a79d5d06dd2c3853dd68e02baffce426c2925491
font_01_sfnt_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 18668 bytes
SHA-256: 3f3c55090d9653bbe3e30ffe2ecf3282ae5173e802c58b3a23710c32b9fbd3d6
font_02_sfnt_off00013139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13139 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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