Malicious PDF — malware analysis report

Static analysis result for SHA-256 d779f92cad0dd339…

MALICIOUS

PDF

81.4 KB Created: 2021-09-03 16:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1d8f363134a07356e6688b2a5b31e36d SHA-1: 847cdd0527ef2cb1d1f745178b27f3edd2c00fdd SHA-256: d779f92cad0dd3394cd282651e1717adf52fcb155b73984d3d9c77f7c1d9d1ca
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://rasorestefano.it/file/23018704186.pdf In PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081f689a928a---jirunelubepumodugobajir.pdfIn PDF document text
    • https://actorconseil.com/files/file/44565641918.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606d57adb1258---zixifosojurodujexage.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/67112229485.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/85727423286.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/noful.pdfIn PDF document text
    • https://drsoleimani.ir/userfiles/file/10168730515.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/78p18nnng41r7sggj261t4cgc2/94152155814.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ae2254525---jovasutinuxibobojetaxuv.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/12169700923.pdfIn PDF document text
    • https://rockoncharters.net/home/rock/public_html/ckfinder/userfiles/files/49974079827.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/fc6f1affa601a45af41a1e8578b2e8cc/56779818099.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/9hqguusujhsudvn9kqc6u0mnh2/lukela.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/nobinox.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b65ef493518---56612991803.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/nncgvr1b6n09h37j9hcvfff25a/gaxofogujifosibi.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a52164162e0---13042245138.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/34778903675.pdfIn PDF document text
    • https://666666.vn/upload/fck/file/97440842769.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-08-23/images/files/85116971684.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/ruhu0b5p5jumr1v8cv196p8hgf/93045449271.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/665810a606614204e0f212e0f1204100/79375835557.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/vemodizufoputada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=excel+vba+code+to+open+pdf+filePDF 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_off0000da7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7E 10636 bytes
SHA-256: a5cfd45e6af7aa86cbe6fcda1c52b347475b328a0eb71d1cebffbe84e2ca1490
font_01_sfnt_off0000f2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD0 17624 bytes
SHA-256: 71d164c26d8bede7f597c00953ce5618fac0e5cd831117ee9251ebe26ac2387f