Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea04bccf7de7d91c…

MALICIOUS

PDF

84.0 KB Created: 2021-09-05 16:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aab349333d2037590052a4192a6e9437 SHA-1: b1285a2e2f1734946b07ee8b6e81dfba917ae7e8 SHA-256: ea04bccf7de7d91cd13484d9877e488a3082c2ade127f5e9511f5d57e2f49ee5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8a8435854---12249777047.pdf In PDF document text
    • http://myagreement.com/UserFiles/file/diseluvujimis.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/93763750297.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085102758548---pabuvige.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/wilidujamese.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608f73d11ccf5---15946635836.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/bamero.pdfIn PDF document text
    • http://artattack-concerts.de//files/file/javetab.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/89726653272.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/21160559185.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/vexewesorakenaroxunekitad.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/48798540106.pdfIn PDF document text
    • http://dgkno.cn/upload/wowixirete.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/1e10a833b1a91a99b3ce8cea53fca0bb/62091179052.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125f17b852e3---bupinibarer.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/81774126548.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/98278494093.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/resirozexizosazo.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/fuxozibaxujud.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/gaxipepaxuwafarazix.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/07173809617.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/vejusudawaz.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c922df4f6---ruvofubamodemozup.pdfIn PDF document text
    • http://perfect-gallery.com/userfiles/file/muwejupi.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/53466699432.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/gidup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=mental+illnesses+list+pdfPDF 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_off0000e4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AE 17876 bytes
SHA-256: 99962de618a59c5c1ce9196b45569e4316874753e98020eccc07714ae0f175c9
font_01_sfnt_off0001130f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B26 10264 bytes
SHA-256: 5983b75b84139309a51214472fce86c157e5b5159e0ae5839a70b3a3de6f6568