Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8caead525d466d…

MALICIOUS

PDF

83.9 KB Created: 2021-09-03 18:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 70e3745014f4f183bf451cbb4d69139c SHA-1: 034b6ff90f0ea5aec31b767dc965c73d86284dab SHA-256: fa8caead525d466df10200a228987572ead73ee316b73db367cd020b3e007e79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links to external websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. The presence of external URIs and link farms on potentially compromised CMS uploads suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pixomot.ru/uplcv?utm_term=domine+deus+agnus+dei+vivaldi+pdf PDF link annotation
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2a39d680f---rafepagov.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fc21717045e---lesafivo.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/39390808248.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/c25c60de0c510bc521214ef055a30111/vewofir.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/34703143300.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/kamegi.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d5efbd9f5a2---63836607422.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/fexajizoxisesak.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/32613328087.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/sagusowed.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/92813288650.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/84182486110.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160850af46df2d---semuzojipetogi.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608900605d894---62528237443.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/fotimajuwanomalavul.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b39453a848---mipusujofanaker.pdfIn PDF document text
    • http://mgrima.com/files/file/15540380107.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/sakijovowutajaveluzerom.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/37563425317.pdfIn PDF document text
    • http://rockfordauburn1966.com/clients/8/85/8549db0cc7d1f63cce07d3be93bd6f3d/File/66852932667.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ad6b4fa7517a2a02f47be6db827c7b9e/pobakejamuzuwavike.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/remixe.pdfIn PDF document text
    • http://exdebt.bg/userfiles/file/5697029390.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/vijefakojoxetojenig.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b829a290615---97811334942.pdfIn PDF document text
    • 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_off0000e2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE6 17936 bytes
SHA-256: f940d7e4887a9b1f4d847d0f6d54c0b019afd38d98fe003fb4c19459c9281b5f
font_02_sfnt_off0001295a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295A 10808 bytes
SHA-256: 1860c6d027aa847ea75242d8a5ce78e59d24decba00c07c3ce015588b372b219

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