Malicious PDF — malware analysis report

Static analysis result for SHA-256 8300805475db8eea…

MALICIOUS

PDF

72.8 KB Created: 2021-09-10 07:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9f2fb7b9af36d15870c5cbf79378ca85 SHA-1: 9324aaf2185f15c4e99d04885cc3150f93793989 SHA-256: 8300805475db8eeabe52abd880ef3eaa517ca9d430aeded36d684939b522fa09
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a significant number of links, many pointing to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The presence of embedded JS suggests an attempt to execute malicious code upon opening.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/0fglvsd7pgdororr2dmjslpd3s/11515741603.pdf In PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/8845246458.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/dosiwepesuxen.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/80088903788.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/powalelaw.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/difufuxagikobetop.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/lizupaxo.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/nesepadizoti.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/86748246063.pdfIn PDF document text
    • https://wasael.com/userfiles/file/3328009239.pdfIn PDF document text
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/71309179225.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/dasezenilusegojeli.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/72b94f357f509c249cb44a49aeaf335f/88682512582.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/29205c7d8144ccb6e5f224002fdaa84d/82641864463.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/sevuxedilis.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/riliwatexevovekeponawem.pdfIn PDF document text
    • https://ykitraders.com/UserFiles/file/76711234618.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/kefosudisag.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/86125770226.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130c804a5d33---98420222522.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/zupikoweraboxanizerux.pdfIn PDF document text
    • https://cyc-catering.pe/disac/userfiles/file/71241124513.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16136ac2ef0393---44613864321.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/xubilewexalasulapedulop.pdfIn PDF document text
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/4120852327.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/nagijubiful.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=real+racing+3+obb+downloadPDF 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_off0000bade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBADE 10724 bytes
SHA-256: 67e80e338b7bdeff7e8a1d8452c09b1b423c9ee92b7e2edb7a4f8eaafcdad486
font_01_sfnt_off0000d366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD366 16192 bytes
SHA-256: a6f8b5023fcaf48dbf7c626415f25990d071113ef5c392acfd78bd07e2e9cdce
font_02_sfnt_off0000fd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1