Malicious PDF — malware analysis report

Static analysis result for SHA-256 236b75dd80000e4e…

MALICIOUS

PDF

84.2 KB Created: 2021-07-21 11:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9ac9d9442240f1d8cc4598da85e252c8 SHA-1: ab2ccab652fe7239d43cc39fa9d6a15b7026f1cc SHA-256: 236b75dd80000e4e1ac39a1993ab120f50c30052eacc0fd88cf52496a026e678
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/143e342da5eb8c9df3a48e1691d900e6/38245171919.pdf In PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efef7d6d1ee---2413672208.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/a31f7fb6d0cc1ffe4b366fcd81ca8645/9659988884.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/nibad.pdfIn PDF document text
    • https://geniodelweb.com/file/rijure.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/vmen2egv9jqanrodbd6u6393gi/mewufarurapukajekatipubud.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/23quk7p7ocp3u99ambaf4ndqu2/warotuwepitanojix.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093af97490fe---vekesozo.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/nixafetibid.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b2e1eaf62---nivobuj.pdfIn PDF document text
    • https://o-dance.com/upload/files/miguf.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/ggjg18737sevo2u6ksqunhj241/54550751567.pdfIn PDF document text
    • http://bvsaigonbinhduong.vn/uploads/files/setowevadagomugugatop.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/4c4ca02b4038f5b1a750e3553ba7c35a/mewufalimiludiluni.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/zegeliwukibawuri.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/voponimirovorovedixemuwe.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f73cce5eb5---kopas.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160ba519fdc12d---robubulo.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/xesurudezovefuvibopedidu.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f6600106b3d---17428609355.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/724bd1d96e79a9c89763e18887c2904a/pajelex.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/laxodoxaxisogivob.pdfIn PDF document text
    • http://salkim.com/userfiles/file/22697693453.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/vomusupesoxaduzega.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=ctet+question+paper+with+answerPDF 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_off0000e68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68B 16988 bytes
SHA-256: 5e34750dcd025249d690657d536b6237bd7ae2287d870099313949cb7530a59b
font_01_sfnt_off000112db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DB 10668 bytes
SHA-256: 1dccdea548fb722f595e83a1785077c50e25a35b1ec30b6e42ea43f2289f8956
font_02_sfnt_off00012b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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