Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff30dbe0245ec8ee…

MALICIOUS

PDF

80.7 KB Created: 2021-10-08 19:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e1ac6fcc00a99f666d3979a05750c847 SHA-1: 2f06dcb4942a5f94bbeaf0a6a079a5f7ba8993b1 SHA-256: ff30dbe0245ec8ee19c8f6ad7df73cd0a3c152d717fa538f2eccb3e0ff255701
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains embedded JavaScript and a significant number of external links, many pointing to potentially compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer, likely to facilitate further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://dralituncer.net/userfiles/file/27351183354.pdf In PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/vedesebibexaleja.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/98781461771.pdfIn PDF document text
    • https://sokole-tps.pl/userfiles/file/10005633430.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/38132152519.pdfIn PDF document text
    • http://caycanh.vn/images/fck/file/78046480742.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109280847376097.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/89108598079.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614884ab9af06---taboxexoribasaw.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/73631042482.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/19916805934.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210924010249.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161569c1bd6949---zusosoxavululujeri.pdfIn PDF document text
    • https://ixiu-23.com/uploads/files/202109060153167142.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/81225907353.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/93586224035.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/3461edf204cbd030908bdce4a6a8dd29/19892962546.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153bdca5c603---gaxedawuvafolo.pdfIn PDF document text
    • https://eurosan.pl/user_images/file/46744543606.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/jujurapew.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/razedexagawazokawinago.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/xisugekufesupixigekok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+new+world+order+ralph+epperson+read+onlinePDF 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_off0000d557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD557 18368 bytes
SHA-256: 6918b325db784ddc590601d61f85e22c99ed2d56972670ede125fa55fdc65804
font_01_sfnt_off0001052c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052C 10440 bytes
SHA-256: 6cb12b458fcafde2d6189d66c75d4df9d899faa9362f71e3ed6ae32042e67454
font_02_sfnt_off00011ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1