Malicious PDF — malware analysis report

Static analysis result for SHA-256 865dd60f8bd06d24…

MALICIOUS

PDF

84.3 KB Created: 2021-08-06 16:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: eeb4bf5477ddf74df585058600e2c81a SHA-1: e5fe1624b1c70ac43ef7b5e8e87ce3316c4e9edd SHA-256: 865dd60f8bd06d240b546618a9b59258450abe9170f6c2adb5025257180e511a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crewmak.ru/uplcv?utm_term=ejercicios+sujeto+y+predicado+para+primaria PDF link annotation
    • http://vitanova-cattery.com/upload/file/91086191558.pdfIn PDF document text
    • https://egf.tw/test2/images/file/kiwuzekum.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16102d24791bf5---bisone.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/goladusewawomape.pdfIn PDF document text
    • https://trunglamdecor.com/uploads/userfiles/file/51250028301.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/liloserizi.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/10995548929.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210603034720.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f44d7c0875---84974916737.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/dbe2b23c8ccb132af59f24718635c71c/wokuzipedelajimofimimewuw.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f147c90a03---2243397086.pdfIn PDF document text
    • http://dejede.com/userfiles/file/gegutem.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/88016712634.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16099a6a4c16fe---39034444694.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/78223850350.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/dc07d66cba9deec5ab917bc84a2d1ded/gazadobosofopatezulo.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210620034239.pdfIn PDF document text
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/xejudonenizeruzedawosefa.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076667fe09af---radunalimijiwexinutixe.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/fevanusigewegedulapadu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE091 19056 bytes
SHA-256: a02a9197fdf0f2d4219d719d8a198c46add5b643323d1eda0d7589c93afcc638
font_01_sfnt_off00011089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11089 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A0 10852 bytes
SHA-256: c0a18d4276cf1ab6579ad335716e0aa875063429a73a78e1b6f30343b40ee2fd

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