Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c510d2e465af32…

MALICIOUS

PDF

67.4 KB Created: 2021-09-24 10:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4af20cd2e014c7c3d304191e22fd556d SHA-1: c60822eff4931067e6c9eb0e9ddaa73f1551bfc9 SHA-256: 47c510d2e465af3283ca8af1bccb060f25ec5cb0a46cdc5e05d74ddf7198d7c3
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://allytemp.ru/uplcv?utm_term=acco+super+bulldozer+cost PDF link annotation
    • http://metabolit-plus.ru/files/file/19592482174.pdfIn PDF document text
    • http://arucax.am/user_images/file/98094564571.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/61950281508.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/32906628556.pdfIn PDF document text
    • https://istanajp.net/contents/files/bijopotazifoju.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161353beac52c9---39912941942.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6ce8313d1---93740210249.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/17908213794.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/0a45499847f87c42beb6214f9b49f8c8/2168664699.pdfIn PDF document text
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/14054440335.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/dfc28222cb3e1b8f820c967b942593d3/todofawumuxosexeziw.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/radabixigoxib.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/femogedebosexagusosudad.pdfIn PDF document text
    • http://huemin.com/fckeditor/userfiles/file/xejibevotafexezux.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/sutojimexukag.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/35948541282.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/161390a3b3c2e4---wititijexekolusetiwavejed.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/86106848201.pdfIn PDF document text
    • http://tatagz.com/uploadfile/files/38408966403.pdfIn PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/10577083610.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/72253652137.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_off0000ac8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC8D 14600 bytes
SHA-256: d0af599abeae4dcab479e4b3640c74f19f412212a63eab2c3d16422a4942a3e6
font_01_sfnt_off0000d0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F9 10428 bytes
SHA-256: 85d97383f3cf332e79b674979ae4f4640b9fb0fd7df936b85e33e4c9514b53c9