Malicious PDF — malware analysis report

Static analysis result for SHA-256 202273a5dc145a12…

MALICIOUS

PDF

101.3 KB Created: 2021-09-04 20:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a1f1e66b733f1454f74711f63a32a27c SHA-1: a9d0d709a7f183c4f86a3f99c59b44b1f36e79d4 SHA-256: 202273a5dc145a12f367df2fe32c39a51bd2d19ba6c6ff2342bbfbb5d66261d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. 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-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 http://go-pxl.com/uploads/files/nopawu.pdf In PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724ad57da1b---fipuvafezib.pdfIn PDF document text
    • http://tulga.ru/editor/files/53228261956.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/jupokuleb.pdfIn PDF document text
    • http://wildzipper.com/clients/wildzipper/userfiles/file/ripitirupaxotoruligowume.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/i4esuhaecl015eclnpbemu8g0r/82505708556.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f5953b1321b---12767513243.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987d05264fa---davozegeridobuvinusim.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/puvotuji.pdfIn PDF document text
    • https://andhimazhai.com/images/files/fagitoso.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/222747923.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/iivc5u7jsok3ui1sdi287g80gn/telokixiduroboso.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/78680988476.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/bovunamomopojipizazavovem.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///modikawanupufo.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/jukivojazasob.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/2c131d5d99d6eac62ad2bd174ac6d1cc/64272498978.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/moxagapoliz.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/62093663345.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/mifomenezinizus.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133614f8244a---pukowewodisevaj.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e7fd53ab5---92123403857.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160af6e58ca5c6---62865956569.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=hunger+games+1+pdf+italianoPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12419 10984 bytes
SHA-256: 33ff847719356969c26ade33104aca2c2b5d1ce319edf380061fa51489b63474
font_01_sfnt_off00013d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5A 19096 bytes
SHA-256: d5b68f6a30823b142a4851de7365915a3dfd5646f35fa8267bde775702453b16
font_02_sfnt_off00016f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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