Malicious PDF — malware analysis report

Static analysis result for SHA-256 238dd085a3c5eda2…

MALICIOUS

PDF

85.3 KB Created: 2021-08-02 11:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4ef6314fdb76e7e9ad1d0758bf4055fe SHA-1: 04de157f6916882b3fd4ddc6f0432cf0d4077858 SHA-256: 238dd085a3c5eda29ddb7ac74b21177dc23a664aedbe76beb0e763cfe90d540a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites or disposable hosting, suggests this document is designed to redirect users to malicious content or phishing pages. The primary attack pattern involves leveraging these links and potentially the embedded script to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=higado+pancreas+y+vesicula+biliar+histologia PDF link annotation
    • http://celiapopememorial.com/clients/4/45/45605e685ba8a3b32f56966823665796/File/98587848476.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78274886e6---jekenilu.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e64f2bf6d---19092979525.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f677d4da08f---fafuxamezaxagexuj.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/91871189406.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/5e337373b70b103139fa4339b0c52d4e/zesaguletazikiwem.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab66cf55648---pipurig.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071741fb3214---24118433866.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/bareni.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/71fde59c0572e61585b95213ab7b7fa1/99436192014.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd680b0f0f3---79215690783.pdfIn PDF document text
    • http://buckleyfamilyofdarling.net/clients/0/01/017bf228c8331327bdfb67b1798bff80/File/65462102953.pdfIn PDF document text
    • http://chieucoingason.vn/files/15956488524.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968503ce524---galisijamewo.pdfIn PDF document text
    • https://medius.sk/userfiles/file/76147733020.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/nufulavenobi.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/8793807059.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/voruwuravamoxasumojasexig.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/koruwunisidategeputobe.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16102e3b013464---7273977373.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/wizulozitasava.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/a5dbdb585ccb2e6f678f2aca26618603/fekavixavefuloxef.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607478f59f68f---74290141374.pdfIn PDF document text
    • https://advik.net/userfiles/file/98026167315.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/39449470752.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_off0000e5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D1 18048 bytes
SHA-256: ee2bc5f892f4cb8e0d6e8bad64385cb9a414c3251b88378c819a85c9b129a828
font_01_sfnt_off000113da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF1 11204 bytes
SHA-256: c3907eab14554e614e7f6eb17d5c16acf87e0b889bb89c799ba15b8e913734c5

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