Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ada48ea4a88998e…

MALICIOUS

PDF

82.9 KB Created: 2021-08-19 08:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: eb479e86cd8bf022d40d54d3e4f683e7 SHA-1: 8aa2a1f31dc01e18a6001c2e163ad7ceabe2db8f SHA-256: 2ada48ea4a88998e2de654cf8dd709e5ec3cc76a0af089b7e34c1235fd0dc60c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous external URIs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users to external sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://cructi.ru/uplcv?utm_term=download+spotify+premium+updated+apk+mod+cracked+no+root PDF link annotation
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a224b0762d7---dadovitasido.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/878vm4m5e0jqbmpc8qco837l60/kilasazelojijamur.pdfIn PDF document text
    • http://rochesteradams75.com/clients/7/77/774a1ed2e17b5a3c8fe4214cc08eab78/File/nuxezolabedusufuxazolu.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/zozugorom.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/kuridoxiwepaje.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b58409d3e60---ralibir.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/5d4994387258f3d283e2d418b0bc232f/43663984789.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab675707788---74716013189.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/ratedamanuzetitapogijef.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/zozidisebaxuwoz.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021071620264473499.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22e6ccf458---gaxotose.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/fasazazuxejirubupeso.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/62873534894.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/gazoxafupesutuza.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3140282cb1---95542739026.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/61917760750.pdfIn PDF document text
    • http://lmnn.ru/userfiles/file/napubikusazanor.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/pavosvj9nb8s9fa0bik6spce20/podavi.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202107090005511161.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///202107315649_1025688026.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/gagifojumajiligifuvinudu.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_off0000dc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF427 11172 bytes
SHA-256: 97aded8e9717764a2e1d38de0a2488f3d84824ed70e0eb4bfefe4afb9e3f5121
font_02_sfnt_off00010e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5F 17216 bytes
SHA-256: 5f58b5bf234c94142437335950338ec83b954c019b802fe74c48e6a316a29cb9

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