Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b079cbd666d820a…

MALICIOUS

PDF

73.9 KB Created: 2021-09-05 11:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9ef436cdc87be08dbb44c29f49a5b0bd SHA-1: ce6784af08ba973c06c8f990fa5f514ed2ee3398 SHA-256: 6b079cbd666d820a0aa11ec5e78c851a146b199540b5e780c9f2c73fffc23851
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure itself does not contain readable text, but the presence of external URIs and compromised CMS upload links strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://philabc.ru/uplcv?utm_term=chiral+hplc+method+development+pdf PDF link annotation
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796dcc42ba3---30452131991.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d3d98d2d6---27571558340.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/gn4fnjr0jatoh625md33c94cg2/muvufikelaz.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/16908272081.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202105260847134975.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/71200957244.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607795a9d148d---52235510926.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/metotofubenamororil.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160974a6204b0e---vatifokuli.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/84d4hucql68i0ojb9kfuq19km4/3945496333.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66dc4ee5bd---75474887286.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/kimekeb.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/fedazo.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a72b002c7f4---pugiwoj.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd24b9cc1f---xisarofimen.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/92199361191.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d2491a51c---79025802374.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/18892711107.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/g7vn751f0crm52466l6s86d11g/wobokosar.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160961f1063ad9---48223199316.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da206243ccb---22807842589.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/81856ed4004ba4cc283ab15df9c6b471/51015701082.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/ruvigukilamoxisifonos.pdfIn PDF document text
    • http://harperfamilyreunion.net/clients/3/35/3566a42c83b0accea4ba2bdfee5c7976/File/xexonumivi.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/fb8dc5d14ff2dbec299afc174338f1f6/fesididazuxixexejeg.pdfIn PDF document text
    • http://www.asslar.de/downloads/36662834199.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_off0000bff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF5 10816 bytes
SHA-256: 0b18dbc8324211842e3dfe015a353b5d07527d9971f2a89af9c30cc1c755466c
font_01_sfnt_off0000d8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B5 16064 bytes
SHA-256: b8090ff39a215801bd339f8b05ff540f157787a7bfb22b3e25a29e07c9fb3e7e
font_02_sfnt_off00010192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10192 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.