Malicious PDF — malware analysis report

Static analysis result for SHA-256 909f11526071e87f…

MALICIOUS

PDF

153.3 KB Created: 2021-09-05 04:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 93aa8caea95dbb20ac36bbb651b59736 SHA-1: e45830b9bf2fc59800a86f59025baa0a36574bc8 SHA-256: 909f11526071e87f29dd974d67fe0c1544dbe8a8c1b29e29c89a9a395fed9802
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised or disposable domains, indicating a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/8040c908951f324a4cd57f470681481e/ruwilipusapomebavil.pdf In PDF document text
    • https://muacash.com/webroot/img/files/82145603430.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/vadenewiravegisoliz.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210624181136.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/861e6aa9a5288860c54b768ad3947dc7/rulowemazilimevajav.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/11402662324.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/79147216632.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/2e9de5594b1bc9a90d78db79d6b0c057/kanopev.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a25076b87d---11421625473.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160984520e2629---83234774391.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16132cd21bf74a---poxaxiboxejoxi.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/fcd8052619e7daaed4e31e0eb102f4d0/26587015262.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16094c880ebf25---33636195883.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/tesukodebexezew.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/931cb7114dd650424a944d8ce8a0f487/17958532537.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4c3b79f21---toludibajeliwibutapapupiv.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/11281514291.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da81c2a524---kofonasanuxedokuzuvilejiw.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/kijag.pdfIn PDF document text
    • http://firegallery.ru/img/upload/32017110075.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/tigonetup.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/sopenavadatirisina.pdfIn PDF document text
    • http://dichvubaove.online/upload/files/15588514242.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/09b01d4bd358850f26d687090890ca3d/79011358512.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=principles+of+management+case+study+questions+and+answers+pdfPDF 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_off0001f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F149 19500 bytes
SHA-256: 4fa6d8803ef148b19ad14cb1edf1d7593faea81816e8170f3234c67d60987c02
font_01_sfnt_off000223ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x223ED 11412 bytes
SHA-256: 2b5127c3e6eb15bd93ed3cf35f0bdfaff7ba13d5a51c83395053a19606bed569
font_02_sfnt_off00023e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23E64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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