Malicious PDF — malware analysis report

Static analysis result for SHA-256 c864deaa2023a82e…

MALICIOUS

PDF

80.5 KB Created: 2021-10-06 17:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 919b6abb9edc7d1150be3a3ebc6f053a SHA-1: 6cbebc7060bd915968307aad1e0559ecc3cd30ba SHA-256: c864deaa2023a82e32010907d3ac46bae8eaaeab4ec28ac6044e2a8b57451f71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous unknown URLs suggests an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161405f3f16bf6---56992062974.pdf In PDF document text
    • https://alpasol.e-giant.net/upload/files/93551608039.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/xonuvazokotonavesivada.pdfIn PDF document text
    • https://butagallery.com/userfiles/files/morigazorujavilululuf.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/libolivamigeso.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/gizasigotabukuvapadupozun.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/23810556702.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/firofokotako.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/nakivukixibaze.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/paworekukiwobexuruniwom.pdfIn PDF document text
    • http://adgroup.co/userfiles/file/649237013.pdfIn PDF document text
    • https://sealskinz.ru/files/file/64379591230.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16137f07bb5b32---tepugerigexojon.pdfIn PDF document text
    • http://safiorida.dk/operatori/userfiles/file/jogapinete.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/91592033417.pdfIn PDF document text
    • http://kag.fr/userfiles/file/rajeki.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1615a504e678ab---89674904311.pdfIn PDF document text
    • http://tnslib.su/userfiles/files/vuvopaxemakufoza.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615836bc85311---29569518994.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/sigumifileleteguk.pdfIn PDF document text
    • http://demo755.webbazaar.com/uploads/16910917858.pdfIn PDF document text
    • http://arrhythmiaclinic.com/userfiles/file/20211006220131.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/fudugometez.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/25302030262.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=you+the+light+you+the+night+song+lyricsPDF 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_off0000d299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 19024 bytes
SHA-256: bd84e695dce0aeb84dea767dfdccdf7e469c4e67e389e4444a39e1928ff80074
font_02_sfnt_off00011c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3A 10544 bytes
SHA-256: 046bf693fe3d19ee5e00b8c6cc9dcb1a19321e0823185bfa804588631d0429ab

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