Malicious PDF — malware analysis report

Static analysis result for SHA-256 f896f3d5f5076efb…

MALICIOUS

PDF

71.7 KB Created: 2021-08-29 00:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 1564aadefcc13eb9e4c9cd5b82f0845d SHA-1: 11912f6835fe37d894e238517926c1a9dd01c115 SHA-256: f896f3d5f5076efbcbb41d243874ef65ba2ee30dbfc8115426e088c53f9b9a92
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to URLs hosted on compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

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 http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160762d002106a---zesefejenideneju.pdf In PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/mixokalumakedurebutomidef.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/87443416735.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/gagolevapujizujopizireb.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/siraginasoxo.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/juvotorepirubugukifumo.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ulqu8u8aht7vjpmlbic9jrmqc6/91769583990.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/folabuz.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/rugawigoxilozuzezelo.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/xurulezisub.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3679ab31c---mefekevifiruvig.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/gegeziga.pdfIn PDF document text
    • https://digireg.cz/upload/munavaxakejudofizewij.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/mubutemelulera.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/53515581379.pdfIn PDF document text
    • http://eaupureinternational.com/userfiles/file/fojebizokasifa.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/6f9b4617b4b3cab9f6244293083775f5/kegelo.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/xabivunamogubeweb.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160797695e5895---suwakaxugivujokera.pdfIn PDF document text
    • http://udaybharat.in/ckfinder/userfiles/files/98891944993.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/47426342952.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d83613534a5---14710969355.pdfIn PDF document text
    • http://bugskin.org/userfiles/file/83190953308.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082d08ea0c2b---mojatuwazitasekutixomo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=onwards+and+upwards+from+herePDF 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_off0000b87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB87F 15928 bytes
SHA-256: 737688a35ce1c23bca6392819b08079aaeeef67b083cf7ea709a7c7cf96fd011
font_01_sfnt_off0000e0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C6 10740 bytes
SHA-256: d5054241fed4d1e86310f6670504bd0847ce461374ef4ef1da23482e29660def
font_02_sfnt_off0000f95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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