Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2cadf81f8eacee…

MALICIOUS

PDF

81.3 KB Created: 2021-09-09 16:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: cee1d6c4e7c56330e9aca760c17da17f SHA-1: 0c66f130ac7e05be5d2566c820bb8eaa492e0987 SHA-256: 1d2cadf81f8eaceeac3a43ca288d1255b29cc4ad569c67da36a76c7f2902d26e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress sites, indicating an attempt to deliver further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript suggests it may be used to facilitate the redirection or download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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.
  • 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 http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161319c06df599---gufetoxofonor.pdf In PDF document text
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/64041418757.pdfIn PDF document text
    • http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/94152664917.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/jojafitudotilebagutogora.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16136166d3dba1---jabezotasuwoxag.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/zunufuvenuxitijuj.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161352601613fa---83363331679.pdfIn PDF document text
    • https://bawauang.com/contents/files/fituvuboruvudalaj.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/33211647471.pdfIn PDF document text
    • http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/filik.pdfIn PDF document text
    • http://3sdent.com/upload/files/26073994255.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/samazerifajasamuf.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/83820934316.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/kujoj.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/6730517843.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/dilokomukimofigulokorok.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/2274470647.pdfIn PDF document text
    • http://edilcfcostruzioni.com/userfiles/files/korifoxezugarotelizanumi.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/41179454211.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/koneruzuto.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/98550890839.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/28279613734.pdfIn PDF document text
    • http://thayloilocnuoctaihanoi.net/upload/files/kisepedeziwaxizurerudi.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/sapofusinidutojuxutire.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/015994b27d98eebe056abfab75dbbd5d/wolakibaguzenuv.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/11461382623.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=removal+of+pharyngeal+tonsilsPDF 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_off0000d824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD824 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03B 11028 bytes
SHA-256: ba9784251014751fb4c87a95c3dd121720b75fd008d3d3bac1252007f8d26b78
font_02_sfnt_off000109bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BF 17836 bytes
SHA-256: 2d8050096b292fd7205fe35e8fe6bf9082fe0043f1288a352bddb401912ab55b

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