Malicious PDF — malware analysis report

Static analysis result for SHA-256 291b712d5e252d7a…

MALICIOUS

PDF

108.1 KB Created: 2021-07-07 17:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0ba6e2e876b6c086b301905c513d54be SHA-1: e9f51d1d6744943e519bd7cce879e26dcacb6e7e SHA-256: 291b712d5e252d7aaabc822f18e8103a967d88474cf9e46e0238580e3455cc68
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains a link farm hosted on compromised WordPress sites, designed to trick users into downloading a password-protected archive. Embedded JavaScript was also detected, likely used to facilitate the download or obfuscate the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crysiq.ru/uplcv?utm_term=onion+sites+meaning PDF link annotation
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098169be5b11---wubitelodaxa.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078a0cb2ef07---vifodarusujikafubudomava.pdfIn PDF document text
    • http://cl-pub.com/files/files/99414399923.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/ripukisafufukorutipab.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/i90cfg370k4vl0bkcqcot2es36/18004428938.pdfIn PDF document text
    • http://kino-cosmic.ru/sadm_files/gefagatikosuladoxedite.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/fasoza.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/puxurumu.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/kanopatebo.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/c73324185dc42ae77bd194ba1933a262/monodikovogaweromijubo.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/cdb9266959d84df3d8565ebc27d951d0/zabojowinadapizirozulef.pdfIn PDF document text
    • https://purmoradiatoriai.lt/images/files/kasomosobiz.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/13580928963.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/223d403ad5ae9327e40d4c94ae0d937b/kenave.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/61469374061.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/luxusafinigusuguxap.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/atdoqvdlc0v3lml16otmner8mp/44174811052.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/bevatipos.pdfIn PDF document text
    • https://arerp.kr/data/file///baxilusofegegovitabo.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7d77ac32b---56745541311.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/5881871503.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/gikuxosuvovimusux.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/f9733e2fef18f747a32f08f736e460dc/folofebog.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6ED 10332 bytes
SHA-256: a0c09d306330c7ffc34621ed61dee25c34be9896ba072c2b0d4397f259debddc
font_01_sfnt_off00010e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E44 17532 bytes
SHA-256: 80f5766fd5cfb3110a38d327b25fc4b34cb438e5d803acd49a7009ce90609c9b
font_02_sfnt_off00013c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C4E 28116 bytes
SHA-256: 9150671d7d660a42f13d1eda304fff1568afeffc18232844480d0b4c3c1fe5f0
font_03_sfnt_off000188da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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