Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4cde46159105346…

MALICIOUS

PDF

84.6 KB Created: 2021-07-14 05:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c1b69e1359aebf0b013179bc23a4b7ca SHA-1: b9596837f314c23a437a88d2199e413e7fc1dc03 SHA-256: b4cde46159105346e3a835166bee1fc62a19200086f74dd227c6dcdf32e8fbee
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body is unreadable, but the presence of many external links and the high-risk heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://studiofapas.it/userfiles/files/98710335812.pdf In PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/03646e1f8b6bd6ad70773c8cff06524d/taragoxosu.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/jisatovi.pdfIn PDF document text
    • http://essuances.com/ckfinder/userfiles/files/lemit.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54e02a56fb---milowawidoxani.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/gq9tf8bjjfqb925qhlf351f6qq/rigosopapulimuni.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/4stehvpgcoo2coimngpkh33pso/20979168840.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/19221218402.pdfIn PDF document text
    • http://greaterdeliveranceministries1.com/clients/61527/File/rapojamuk.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/6vp4eq3l29bece29qfj5i3fln7/wavarofazagofevijifusana.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c0ece53cb---68547299126.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/43261343339.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/41345678236.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/h2ael2sjnd8ob8ncr223pcsqt1/madogami.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/92l62dii454a7u279pjd2d3an3/88516064946.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/30365741220.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/76228352908.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812696c9c55---66864497676.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/b82428aa65b0c72ff199c494c5007360/zimerefususosi.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862598625ab---luragotiritirolijibibasov.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/rj08j9hqcr83duvbt1poobre99/18040277806.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/xuperorinowebinoki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=no+quarter+given+meaningPDF 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_off0000e78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78E 17780 bytes
SHA-256: fdc085602987f3a92002c770512584212547e6982de8fd79025e8558fb586dea
font_01_sfnt_off000115d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D7 10524 bytes
SHA-256: 6dcbe1fc84668b0c4d30a935f0ca1bc7b2741f9078840524b674be0f3291d420
font_02_sfnt_off00012d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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