Malicious PDF — malware analysis report

Static analysis result for SHA-256 be26e4ae54802337…

MALICIOUS

PDF

78.2 KB Created: 2021-09-04 05:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 57aaf9b3901dd058fc63e5e08b209af8 SHA-1: fd77d30b02c33296df62d1f5802996a7cfcf43c7 SHA-256: be26e4ae548023374484177aea8c63206cde4d6b3a9369bbe9c795d9d8b131c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external links and the overall structure point towards a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.savininkai.lt/ckfinder/userfiles/files/95176983226.pdf In PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/12219792015.pdfIn PDF document text
    • http://nguyenphat.com/public/default/ckeditor/files/38608075532.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/2u9td4hu48ikt0qvqkaqfkopc2/zujezuvawutiva.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/batilezakoluwogod.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/kt06d4vqh5d353hvpjfqjre9t9/30032302793.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/mavogidivedaduxebeviber.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730e6778d61---pufibizejexorinoleragi.pdfIn PDF document text
    • https://kocarbon.vn/luutru/files/jebenokabujabivemomeba.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/20222915498.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202108262253275885.pdfIn PDF document text
    • http://k1a.ru/images/files/file/tegopomabefipamerosijeka.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/75196267370.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/19493678289.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/pubulego.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/gutariwadojajewijiko.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126b7279c05d---sajidekolizukiviwe.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/16a6dee1e2216e9b1ed8ad1703f39dbc/780427802.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc55105444e---50089151593.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161059bfa83824---55202358883.pdfIn PDF document text
    • https://factinet.com/uploads/files/viberivebivazuxu.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/pedimuvekupasizovagijo.pdfIn PDF document text
    • https://svltv.in/userfiles/files/60171792477.pdfIn PDF document text
    • http://gro-felix.si/uploads/nujoterelisek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=a+level+physics+book+pakistan+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_off0000c725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC725 19380 bytes
SHA-256: df445376150a747f73a6af4d85182817e0ad9bcf403482b047f7b9472ad67db1
font_01_sfnt_off0000f979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF979 11012 bytes
SHA-256: 1a1e49574bd46bd424f111892157cd314908314f2f0fc913b3a8c8447cac92bb
font_02_sfnt_off000112e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1