Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ae307273570ff0…

MALICIOUS

PDF

82.5 KB Created: 2021-09-06 14:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 21ca238e675525f818ed28ba91b374ca SHA-1: e251da9484fd0c8a9e2247088684b712b4e377b7 SHA-256: c8ae307273570ff06275a9ff67d4652525026772785cc1ac69f0417e2a172707
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many hosted on compromised WordPress sites, indicate a link farm designed to redirect users to potentially malicious content. The presence of external URIs and link farms suggests an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=table+manners+worksheets+for+preschoolers PDF link annotation
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160966eb7f4228---nonijob.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/pababavesogevikadi.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610df8f9bbef9---29542576558.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/94863925016.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d954e137cc---76556997073.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/sizozeviduvoxumuzupafo.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/gbl2m9gvtql9u8kcsnia2e5jtc/tolodij.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089a0a2d7df8---sedumexododegokedisubuxuv.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe6ef7a498---37165795268.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/ralujabakusewojabadunajav.pdfIn PDF document text
    • http://svx.su/ffile/file/xamawivez.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/zosovafijaso.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/63837172198.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a7ceade8b---dobox.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/zudumejekajos.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/3c3ae13f2831fc69971a3855f9a88026/5781618666.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/xewopuzapapekemividaxug.pdfIn PDF document text
    • http://scarpatti.com/files/xodedipevujogitobaguwikez.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/ae18b7ff3d2b637615384a0de36a099c/26454054660.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/rezonepewi.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/53719678569.pdfIn PDF document text
    • https://beaszemin.com/files/45086133083.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/4810184112.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/9dsd138mmbc4q0v6p7tkon0o57/17757327299.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/pevadagovan.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/vamafopasuwo.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607715856f25b---nowibo.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_off0000de72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE72 10932 bytes
SHA-256: 1484c87a570786f31bbd01dd1463a919a95acfd9c365f354ac5a6fe1d52365b8
font_01_sfnt_off0000f777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF777 17332 bytes
SHA-256: 6846f000a0ee78ba78add8ffd6839da8aa15a43f60f9d5319e566cc38735b7ec
font_02_sfnt_off0001241b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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