Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3f1ad753ba82ed…

MALICIOUS

PDF

85.8 KB Created: 2021-07-16 18:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 79209e6b1a1939f552eae0df1416dee7 SHA-1: 64115bb52dc45e479c16682271ed77efdb1d1f63 SHA-256: ee3f1ad753ba82ed6d2ba265aca208f666a7e0561ca087883872d18c7ecd6217
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for exploiting vulnerabilities or redirecting users. It also features a link farm pointing to compromised WordPress sites, indicating an attempt to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/tjrjgthslo21ta20ljjvrs4u81/43973153558.pdf In PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87c067deb5---77995283969.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/9292b9779c77da54325036c588bcdd8e/tadunaw.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/31897469954.pdfIn PDF document text
    • https://www.puskinas.lt/ckfinder/userfiles/files/8701110429.pdfIn PDF document text
    • http://nlureunion.com/clients/33063/File/rumavimawetoxejibote.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/7098514419.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/oqfqov0dm8uif4rigt7a1qvls4/xolijizik.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/49513254413.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021070204512094.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/cba7ae98b7227487a6c9d092e2b4b009/soropiwewidovinuze.pdfIn PDF document text
    • http://bluedevils59.com/clients/862365/File/97928436245.pdfIn PDF document text
    • http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/dekerudurubusevivefunate.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/36305511610.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f371245a2f---tebuj.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/20af37a913c9c0701beb14d8e638a0d7/42200831504.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/2330706731.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/8652831369.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/juwupuwuxofikexasura.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/vowawugoloxew.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160749aa9b465d---relumolupom.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/majevejivililamage.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/dfc94e41d4c7ab13a4534669c78b09ee/57032719926.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecdba7aadb---poginogumizotu.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/47492896364.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/97963202129.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=southern+smothered+pork+chopsPDF 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_off0000eb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6D 17692 bytes
SHA-256: f81cbd0ba70e10b4244d1dcb7c7759550d6522c9b93de74b3af3e74e988e8b91
font_01_sfnt_off00011921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11921 10748 bytes
SHA-256: b0b22d6f3f172f471ab0bb2648feb8dee3c1fdf3125d05f23470949102494939
font_02_sfnt_off000131af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1