Malicious PDF — malware analysis report

Static analysis result for SHA-256 babc5da66600aa4d…

MALICIOUS

PDF

85.8 KB Created: 2021-07-31 10:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 4e1bb8ed3fdb8dc2fac9e0626de687ee SHA-1: 10b40e2e8ad1cd07e5872377300ace35bc61356c SHA-256: babc5da66600aa4d8f62155f15f1c67269b0cfb2eeec9b997392c7eb1e9ec2f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised CMS upload links further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://www.findvoters.com/userfiles/file/vulipawagopewatelekip.pdf In PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1d059d294f8c443489b067a7a13e9dfe/puvelu.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1eb7c609e2---8901629302.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/27053981174.pdfIn PDF document text
    • https://kolkatanagariksammelan.org/ckfinder/userfiles/files/28140339688.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d458ca6a4---lagof.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/domuru.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/91fc98afe4b264109879426349c6d870/mukemidamowabubotibodezo.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/41541993352.pdfIn PDF document text
    • http://beytarimcilik.com/admin/editor_resim/file/budavef.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ca24d0f22---35342948306.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/bewapo.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/f2d97b2da195d416739b46f5f3184bdb/lekowojesudadafowuserabe.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c125366053f---xunagabigekotase.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/rfe0leffd043jkelljh39ogvc2/24233239133.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/98912654961.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/720ffe53bf5d5a2c6158c5d53d8f5fc7/topijusulijo.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef626b8473---pijezujunado.pdfIn PDF document text
    • http://sodrex.pl/userfiles/file/19588042678.pdfIn PDF document text
    • https://birudongker.com/contents//files/29734198698.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/lujekewi.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/12010102000.pdfIn PDF document text
    • http://meta-min.com/files/30878918376.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+diagnose+acute+abdomenPDF 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_off0000ed66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED66 16612 bytes
SHA-256: fe79f088d368dd3d2c3ee6d37e141cd4bf23e5a969543755ed9a5f3bd86cff09
font_01_sfnt_off000117ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC4 10884 bytes
SHA-256: 0ed1c69a168c515db6e749d64e3418b7b7372e9453f44f02e7ccdc7c404412de

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