Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30bdffb1279f0e4…

MALICIOUS

PDF

72.3 KB Created: 2021-09-24 10:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0b10cac0652c3e0e801a79c69b76d18a SHA-1: 8badcb4a90902f25c68b469d5cad96775cb8a585 SHA-256: f30bdffb1279f0e4dc39f516f3772ba8eee1bb1f8fc7f57cc9c921a5bed4bf34
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a significant number of external URIs, many of which are part of a link farm hosted on disposable or compromised domains. The embedded JavaScript and the nature of the URLs suggest an attempt to redirect the user to phishing or malware-hosting sites, aligning with the 'Pdf.Phishing.Trojan' detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://infrive.ru/uplcv?utm_term=bikini+photo+editor PDF link annotation
    • http://vitrine-prof.com/files/23456491328.pdfIn PDF document text
    • https://amt-alarmy.pl/userfiles/file/38530536211.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143acab29797---57121324934.pdfIn PDF document text
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/niligilet.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/80750284536.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/ditagewu.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/finasesox.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea41601cf3---vadigopilavupagedupavip.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/98008246614.pdfIn PDF document text
    • https://idosekotthonaveresegyhaz.hu/files/files/vipofubefudutajuk.pdfIn PDF document text
    • http://gdgom.com/upload/file/210908200350243378lrn8o0hwpsut.pdfIn PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/26996630640.pdfIn PDF document text
    • http://hflchw.com/upload/file/womavemesimajekawok.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a817d30e2f---xibewepitudalavaxosasera.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///8985890215.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/wusimajovenaroron.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/18756806215.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/kewerutuzonuruvagevul.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/4703706539.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/tizuxezukofugo.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/78733404708.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1631323673_28ee665cc6.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_off0000ba15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD227 16476 bytes
SHA-256: bbcf4c8abe83d9bcfe64bde5e1adf92df5fad2762a2beb6dc900c61c42971f6a
font_02_sfnt_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 10256 bytes
SHA-256: b13ecbe34c5c5c4e3ebd784e233c4b9bf9a97cce6eb20a31b09268f0485ecd9e

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