Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7e2cfe51a0eb54…

MALICIOUS

PDF

68.8 KB Created: 2021-09-25 01:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 851a4a0cb5971b8d363bbaee4dbc9503 SHA-1: 180657d4644c1b63921728aa8a54ef35668a6bc0 SHA-256: ba7e2cfe51a0eb541123aee3e41719dac2f86187390e2f901b1b359a7e83d13a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting an attempt to host malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://donovaly-ubytovanie-safran.sk/web/userfiles/file/xizasevumelefakopakit.pdf In PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/40258839446.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/35992863543.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/sofadomuxe.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea3f5e167d---53139317173.pdfIn PDF document text
    • https://sealskinz.ru/files/file/vilunirojufapegap.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16137d8d2d5d9f---26217496185.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/79760809751.pdfIn PDF document text
    • http://adbrf.com/files/fckeditor/file/103819766361466c8e7e9f2.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/43926005010.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b0439d90f8---85195288471.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/17874415253.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b269d41219---53864297086.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/39352149723.pdfIn PDF document text
    • http://gorsilawfirm.com/userfiles/file/penuwumudit.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/lefelurazexolifekeka.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/videxawag.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/viluwer.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/2125262432.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/wakubamunefupazezegizur.pdfIn PDF document text
    • https://hoya.mobioptika.hr/UserFiles/file/vajojigekulifikijovuxemi.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/24775140734.pdfIn PDF document text
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/96508319630.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=modern+strike+hack+apk+downloadPDF 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_off0000af20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF20 10784 bytes
SHA-256: cdbbf0df775aaf276805664a18601c14428fb759ecab1d216efc6b1f2be892eb
font_01_sfnt_off0000c7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F2 15212 bytes
SHA-256: 1b4ac486991a965b18c0434fdc974444262b9b76963bf8832233a9dc60ec5377
font_02_sfnt_off0000ee07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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