Malicious PDF — malware analysis report

Static analysis result for SHA-256 0604f10305d532f5…

MALICIOUS

PDF

89.8 KB Created: 2021-07-08 04:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ab8f1c96a8ba243e2d05f1d246b3977d SHA-1: 4b7c011207b2fd21be4f60865dad4b454990f0b2 SHA-256: 0604f10305d532f54b7b169edb0516f3c1e9113b26e0897adc989663d21538db
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and embedded URLs point towards a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/d57b3cdd5a7b0f04a4214b2850363fe0/15727597190.pdf In PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/gghubim5su9n20a38hf8d540tc/zefonixupizegipadixurir.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/50273802661.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608341f357680---vamogevasutoripenadamix.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160947340af167---wisipet.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/f7a58f5dd14cf2277214aa1faf9dacfd/10609958271.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/be0e1ca3c0a49d4079c6d39131ada114/65997559650.pdfIn PDF document text
    • https://fishboat.hr/files/pebiforaponafugejozakuve.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/84daaade4f32eff69bf675d2f6e8bdc0/73914543348.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/28983383573.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607108dab6820---16207762065.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096652436c45---62501768459.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/fef4a734b9f5070023744f35dbeb97c0/11277283297.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/wewir.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/84401786984.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b48551c65e1---41622465792.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d63123635---18736875751.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c3348bf43---zosuzedatedenojoxekojezaw.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab14e5e464f---2297021193.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607093b131404---47685705111.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c3e443197---98626601025.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/8bb612b45238f1a339964aa4ec8b1642/resulimufisiseramar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=grignard+reaction+with+ketone+mechanismPDF 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

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_off0000f990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF990 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A7 10988 bytes
SHA-256: ec138e0ec16de99cb2c151513c3172d2a342af888e16f8deb078a334c00c5902
font_02_sfnt_off00012adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADF 17872 bytes
SHA-256: ff5017d94fae06989ce98a7dd260b82f8822aad615bd07f91991e43540b2333f

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