Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5453058a69943b…

MALICIOUS

PDF

79.6 KB Created: 2021-09-04 10:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ecf4696e8fd305432bf5aac0b9910cad SHA-1: 7caeae3139bc7d78b36a4de4e436d12fba3ff04f SHA-256: ec5453058a69943b941452210a0d17e15ff75940d3f2f9b4ecef2dc0db907994
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/mb44klnanlri935g5udggvdq52/volewig.pdf In PDF document text
    • http://ajivikafinance.com/userfiles/file/27279833170.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/2dq8f2v7m2hk8054co5id98bqu/nubawijiwonixuziro.pdfIn PDF document text
    • http://sushi-belovo.ru/files/885454405.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/f23c20c17f1d5efdf920e8e28df92f80/58686654992.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/vowijofuvaxulitanubuxox.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/62451806941.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c41c0d9dc8---newabewenedovoxapa.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a30c161277---48621910374.pdfIn PDF document text
    • https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/27eb7b83300221d61367b14288b4b1f6/60671910858.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/kitewerukorusibeka.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8fe2417c8---defasikovupilapevugotuxan.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9f4b6d7f2---35093962414.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/4027691393.pdfIn PDF document text
    • http://gok-maciejowice.pl/js/ckfinder/userfiles/files/32279148521.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/gadet.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/fukisi.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/zewodivokelokumit.pdfIn PDF document text
    • http://www.tahi.hu/ckfinder/userfiles/files/rugorux.pdfIn PDF document text
    • http://datev.hu/ckfinder/userfiles/files/99973460346.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/3a179b732274e6693b3d4c46eca18d15/boroxugogowadiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=scabies+kelinci+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_off0000d618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD618 10600 bytes
SHA-256: 2db8a23c836f5ebe023538982a68e0d6f211fd9dbb16c974f074524d2c742dac
font_01_sfnt_off0000ee25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10637 17056 bytes
SHA-256: 24d53c2cf4d2815b0cfd716f9977422bff0d6b3378b5fdc662e398669ea07865

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