Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b0ff87a8279427…

MALICIOUS

PDF

92.4 KB Created: 2021-09-03 20:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 49d7cfc226bafb2258466cfc77a4411b SHA-1: d1b46bd0638ca21d2278bfe0016a68ce6befe70c SHA-256: 35b0ff87a82794277af613c30527497a6b7ffa151b1acb450c7a1b5bfd88dd77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure itself is used to host a large number of potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 6

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=uber+eats+logo+pdf PDF link annotation
    • https://drisraadentalcenter.com/userfiles/file/mumonujekobumigolusano.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/e8d66009c0a50446ae3f6024e064ac0a/30129215275.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/sireratujagorawone.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/kum082e9pspuo5ubn8unn3jber/45450012582.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/motufoliwi.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/zodivuvibogor.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/rewibevulerowuxugamigolen.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/4122899674.pdfIn PDF document text
    • http://asfus.net/virgsurv/userfiles/file/sodok.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/28752811730.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16076738322545---zamumuvojug.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/83334208847.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f32eb2ca0---tisafavijowod.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/2t4f2b84di8c92vpghvkuqgdl5/61221335589.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/qckkj1r24kobvpkp7ng0prhhan/21817804297.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/wezifezawo.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb5992131c---mipudesudaf.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608c68c67f9e3---7790242810.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/70035850922.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/84952805639.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-10/20210510025039866175.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/bnn4ju64c8mnrtin3u8hjum2ud/wavumu.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/0kiiap3jaaf3lu2gc0d5l5pi6f/fifisobekop.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a37e59b09ac---madegiseluzekakivozonij.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/dafumorivawapigopedefem.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/6ef1a78837cc130f3e5e9d27475b6fe1/93741389028.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_off00010180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10180 10624 bytes
SHA-256: 020e661999496920da272c123837831805ea33eab3bb2383f0162c64d1d43c92
font_01_sfnt_off00011987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11987 19112 bytes
SHA-256: 34a79461820cb07c53535d6f8509c4783fa9a2a3c3735abdbb386b107ceecdd6
font_02_sfnt_off00014baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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